Karuna Therapeutics, Inc. (KRTX) Q1 2023 Earnings Call Transcript

Karuna Therapeutics, Inc. (NASDAQ:KRTX) Q1 2023 Earnings Conference Call May 4, 2023 8:00 AM ET

Company Participants

Alexis Smith – Senior Director of Investor Relations

Bill Meury – President and Chief Executive Officer

Troy Ignelzi – Chief Financial Officer

Andrew Miller – Founder and Chief Operating Officer

Conference Call Participants

Paul Matteis – Stifel

Nick Lenard – JPMorgan

Jason Gerberry – BofA Securities

Neena Bitritto-Garg – Citi

Laura Chico – Wedbush Securities

Jay Olson – Oppenheimer

David Amsellem – Piper Sandler

Yatin Suneja – Guggenheim Securities

Myles Minter – William Blair

Jason Butler – JMP Securities

Joseph Spak – RBC Capital Markets

Rudy Li – SVB Securities

Operator

Welcome to the Karuna Therapeutics First Quarter 2023 Financial Results Conference Call. All participants are in a listen-only mode. Please note this call is being recorded.

And I will now turn the call over to Alexis Smith, Senior Director of Investor Relations.

Alexis Smith

Thank you. Good morning, everyone, and thank you for joining our First Quarter 2023 Financial Results Conference Call. I’m joined on the call today by Bill Meury, President and Chief Executive Officer; and Troy Ignelzi, Chief Financial Officer, who will begin our call with prepared remarks as well as Andrew Miller, Founder and Chief Operating Officer; and Will Kane, Chief Commercial Officer, who will join Bill and Troy for the Q&A portion of our call.

Before we begin, I encourage everyone to visit the Investors page of our website at investors.karunatx.com to find our press release and presentation related to today’s call.

Forward-looking statements related to our product development, regulatory and commercialization plans or research activities and financial outlook may be presented during this call. Please refer to today’s press release and our SEC filings for important risk factors that could cause our actual performance and results to differ materially from those expressed or implied in these forward-looking statements.

And now I’ll hand it over to Bill.

Bill Meury

Thanks, Alexis, and good morning, everyone. In the beginning of this year, we outlined three strategic and operational priorities. The first is to build the core, which means maximizing the value of KarXT through our continued development efforts, submitting the NDA in the third quarter, securing FDA approval and successfully launching KarXT in 2024. The second is to expand our pipeline organically and inorganically. And the third is to scale the company and build the operational capabilities needed to support our transition to an integrated R&D and commercial organization.

As we sit here today on May 4th, I can say, we’ve made excellent progress in all three areas. Let’s start with the important development and regulatory updates for KarXT. In the first quarter, we announced positive data from EMERGENT-3, our third consecutive positive efficacy and safety trial evaluating KarXT and schizophrenia.

In the trial, KarXT demonstrated a statistically significant and clinically meaningful 8.4 point reduction in the PANSS total score at week five with a p-value less than 0.0001 and a Cohen’s d effect of 0.6.

KarXT has now demonstrated clear and consistent antipsychotic activity across three registrational studies, whether one looks at the PANSS, effect size or p-values. In the trial, KarXT was generally well tolerated with a side effect profile substantially consistent with our prior schizophrenia trials, as expected, mostly cholinergic side effects, which were mild to moderate in severity and generally transient in nature.

Just as important as we didn’t see weight gain, EPS and somnolence, which are common with many atypical antipsychotics. These side effects can be burdensome for patients and reduce compliance, leading to relapse and hospitalization and negatively impact overall treatment outcomes in schizophrenia and the lack of these side effects can be meaningful for patients.

We look forward to presenting additional data at Medical Congresses this month, including new efficacy and safety results such as CGI-S, AE rates and vital sign data from EMERGENT-3 as well as the exploratory endpoint analysis evaluating KarXT in cognition for EMERGENT-2 and EMERGENT-3 trials. The totality of the data generated to date reinforces the potential of KarXT to be a completely new and differentiated pharmacological treatment of schizophrenia that should be very well received by the psychiatry community if approved.

In addition to EMERGENT-3, we made significant progress advancing EMERGENT-4 and EMERGENT-5, our 52-week open-label trials evaluating the long-term safety of KarXT in schizophrenia. EMERGENT-4 completed enrollment at the end of last year and we anticipate wrapping up enrollment for EMERGENT-5 this quarter.

Both trials are designed to provide long-term safety data as well as contribute to overall safety exposures to support our NDA. There’s a great deal of valuable information that can be garnered from both studies, not only for the NDA, but also for medical education. We’ll plan to share data from these trials in 2024.

Outside the trials in the EMERGENT program, our Phase 1B trial evaluating the effect of KarXT on 24-hour ambulatory blood pressure is well underway. We initiated the trial in April and are very pleased by our enrollment numbers to date, and we expect top line data in the fourth quarter of this year.

On the regulatory front, we had a positive pre-NDA meeting with the FDA this quarter, which reinforced our key assumptions related to our data package and timing, and we continue to target our NDA submission for the third quarter of this year.

We expect formal meeting minutes later this month, and we will provide more information as appropriate. In the meantime, the organization is well on its way to preparing our submission and getting ready for the potential approval of KarXT in the second half of 2024.

Now turning to our second indication, adjunctive treatment of schizophrenia and its respective program, ARISE, which is evaluating KarXT on top of standard of care in adult who experience an inadequate response to their current atypical treatment.

The Phase 3 program includes a six-week outpatient trial evaluating the efficacy and safety of KarXT compared to placebo and an optional 52-week open-label extension trial that evaluates the long-term safety of KarXT as an adjunctive therapy. This morning, we announced that we now anticipate top line data from the ARISE trial in the second half of 2024, an update to our previous guidance of the first half of 2024. This is primarily driven by enrollment.

Our clinical development and clinical operations teams are implementing several measures to increase enrollment. First, we’re in the process of activating more than 20 ex-US sites in Bulgaria and Serbia on top of the existing 30 or so active sites in the United States. A few of these ex-US sites are recruiting as of last week and more will be activated in the coming weeks and months.

Second, changes have been made to support site operations, recruitment and physician and patient experience. This includes enhanced site communications, changes in technology and marketing support. And third, clinical trial site budgets have been reviewed and adjusted where necessary to reflect additional efforts. Timely completion of this study is important, and we’re taking all the necessary steps to shore up execution in a timely manner without compromising quality.

Now briefly on our ADEPT program, which is evaluating KarXT in psychosis in Alzheimer’s disease for which there is no FDA approved treatment. The ADEPT program, which consists of three clinical studies, ADEPT-1, ADEPT-2 and ADEPT-3, remains on track.

ADEPT-1, our randomized withdrawal trial is underway in actively enrolling patients, and we expect to have ADEPT-2, a 12-week acute efficacy and safety trial and ADEPT-3 via optional open-label extension up and running in the second half of the year. Data from these trials are expected in 2025.

Now on to building our pipeline. In February, we announced an exclusive global in-license agreement for TRPC4/5 inhibitors for the treatment of mood and anxiety disorders, including lead clinical stage candidate KAR-2618. This transaction met all of our criteria.

Scientifically, TRPC4/5 represents a completely novel pharmacological approach in mood and anxiety with validation in preclinical and early clinical models. Strategically, it expands and diversifies our psychiatry portfolio. And lastly, it could be an important source of value for the company in the future. We look forward to sharing more details on KAR-2618 planned development program later this year.

Turning to our operational priorities for this year. We’ve made excellent progress building our capabilities and team. Our 2023 staffing plan includes over 100 new hires. We’ve already successfully filled 45 of those roles, including our Chief Commercial Officer, Will Kane, who brings a great deal of launch experience in neuroscience, including schizophrenia and Alzheimer’s.

We’ve expanded teams such as our medical affairs and market access groups to support our pre-commercialization activities with the medical community and payers among others. We plan to engage in scientific exchange at over 30 different national and regional medical meetings and in parallel, develop and publish several key posters, publications and review articles. These are important efforts that require effective planning, and we have the team in place to do it.

I’d like to turn this call over to Troy to expand on our first quarter financials and how we’re thinking about our cash runway for the years ahead.

Troy Ignelzi

Thank you, Bill, and good morning, everyone. I’ll begin with an overview of our current cash position and financial results for the first quarter of 2023, followed by our financial outlook for the remainder of 2023 and 2024. In March, we completed a follow-on public offering that resulted in net proceeds of $436.7 million, increasing our cash position from $1.1 billion at the end of 2022 to $1.5 billion as of March 31st, 2023.

We expect the current cash to fund our operations through the end of 2026. Importantly, our cash runway extends at least two years after our expected commercial launch of KarXT in schizophrenia in the second half of 2024, if approved by the FDA. Total operating expenses for the first quarter were $109.7 million compared to $58.6 million the year prior.

Operating expenses were slightly offset by $11.3 million in interest income and less than $1 million in licensing revenue associated with sales of clinical drug supply to Zai Labs. R&D expense for the first quarter was $85.5 million, an increase of $41.7 million versus the prior year period, which was primarily driven by expenses related to the EMERGENT, ARISE and ADEPT clinical programs. NDA supporting activities, the $15 million upfront license payment for Goldfinch Bio’s TRPC4/5 channel candidate as well as increased employee headcount and higher stock-based compensation expense.

G&A for the first quarter was $24.3 million, an increase of $9.5 million versus the prior year period, which was primarily driven by an increase in commercial prep activities, professional fees, employee headcount and again, higher base stock compensation expense. We expect our R&D expense to remain relatively consistent on a quarterly basis for the remainder of the year and for SG&A expense to increase modestly quarter-over-quarter as we continue to build commercial capabilities and corporate infrastructure.

We are reiterating our previous financial guidance for the full year 2023, with overall operating expenses ranging between $430 million and $470 million, which includes up to $70 million in noncash stock-based compensation expense. Of this, we anticipate R&D expenses to range between $310 million and $340 million, which includes up to $35 million in noncash stock-based compensation, and we expect SG&A expenses to range between $120 million and $130 million, which also includes up to $35 million in noncash stock-based compensation. We expect total OpEx for 2024 to be similar to 2023 with a decrease in R&D and a corresponding increase in SG&A.

With that, I’ll hand it back to Bill.

Bill Meury

Thanks, Troy. As I mentioned earlier, I’m encouraged by the progress we’ve made a really strong start to the year from development, regulatory and operational perspectives. We’re well positioned and well capitalized with the management team and in-house expertise needed to execute against our three strategic priorities, and I look forward to providing future updates across our programs and business.

And with that, I’ll turn it over to the operator to begin Q&A.

Question-and-Answer Session

Operator

[Operator Instructions] And your first question will come from Salveen Richter. Your line is open.

Unidentified Analyst

Hi. Thanks for taking our question and congrats on the progress. This is Tommy on for Salveen. Just one on the pre-NDA meeting here. What came out of this meeting? And what are the remaining gating items here? And also, could you help frame expectations into the cognition data? Thank you.

Bill Meury

Yes. Thanks for the question. I’ll answer it and ask Andrew Miller to expand on it. As it relates to the pre-NDA meeting, and we’ve communicated this in the past, it was largely procedural.

We wanted to confirm, reinforce key assumptions related to our data submission and timing, our statistical analysis plan, among several other things. It was very positive and productive meeting. As we said in the opening remarks, we’re on track to submit our NDA in the third quarter of 2023. So there were really no surprises at all in the meeting. That being said, we expect to have the formal meeting minutes at the end of the month.

As it relates to the cognition data, we’ll share that information at the ASCP meeting in May. It was a full analysis of EMERGENT-2 and EMERGENT-3. Look, the unmet need here is high. Cognition is an essential feature of schizophrenia. There’s no FDA-approved treatment right now and it’s one of the major predictors of long-term functional outcomes.

We’re encouraged by what we see. When I look at the data, I think it leads me to want to do additional clinical development work, and that will be something that comes into focus over the next several months and quarters. But net-net, I believe, it was a positive. Andrew?

Andrew Miller

Yes. Maybe just quickly add to that. I mean I think from the cognition perspective, obviously, this is an exploratory endpoint as part of our study. But I think we are encouraged when you look across the arc of all information that’s available to us to date around xanomeline and KarXT from the biological rationale to the preclinical data, to the data from historical studies with xanomeline in Alzheimer’s and schizophrenia and the studies with KarXT as part of the EMERGENT program. So we look forward to presenting more details of that here at the end of the month.

Operator

Great. Our next question comes from [Tom Mattel] (ph). Your line is open.

Paul Matteis

Thanks. That was Paul Matteis here. That was an interesting pronunciation. Okay. Thanks again for taking the questions and congrats on all the progress. I had one question on the — on your FDA meeting. Just — did it come up at all as to whether your approach to submitting the ABPM data in some sort of safety update during the review. Did you get any confirmation that that’s an acceptable strategy with the FDA? And then, I guess, just how do you guys plan articulating those data and sharing that result? Thank you.

Bill Meury

Thanks, Paul. It’s Bill. I’ll let Andrew answer the question regarding ABPM.

Andrew Miller

Sure. Thanks, Bill. Of course, obviously, as part of the pre-NDA meeting, we really discussed the overall development program and all of our studies across EMERGENT, a variety of Phase 1 studies, QTC, hepatic renal impairment as well as specifically the ABPM study. We do think based on that discussion, it’s a reasonable strategy to present the ABPM data the day 120 safety update, which would be our current plan.

Really, I think that’s consistent with precedent and consistent with the idea that presenting additional data from a Phase 1 safety trial, such as the ABPM study would be a reasonable plan. We, of course, have clinical vital sign assessment as part of our all of our clinical studies. So this is really just an enhancement of that data set, a complement to that data set. And we do think that’s a reasonable strategy to provide alongside all the other safety data that will come at that day 120 safety update.

Paul Matteis

Thanks, Andrew. And any comment on the — on just how you guys will articulate those data at the street?

Andrew Miller

I mean I think we haven’t gotten into specifics at that, at this point. Obviously, typically, with the top line data release would be some sort of communication of the primary endpoint or potentially key secondary endpoints. So we’ll keep thinking about that. But obviously, we want to get the information now in a timely manner once we receive it.

Paul Matteis

Makes sense. Thanks so much.

Operator

And your next question comes from Jessica Fye. Your line is open.

Nick Lenard

Hey, this is Nick on for Jess. Thanks for taking our questions. I kind of mentioned this, but on the NDA filing, can you just kind of recap some of the activities that remain ahead of the potential filing time? And in particular I know you mentioned this associated with E3D4. But in terms of the exposure data like are you on track to recruit adequate amount of that data ahead of it? Thanks.

Bill Meury

Yes, absolutely. With respect to the long-term safety study, it’s EMERGENT-4 and EMERGENT-5. I think we’ve been communicating really for the last almost a year that long-term safety with — from a data perspective is likely to be the gating factor. I think, obviously, as we approach the submission very close at hand now in quarter three of this year, that shifts really from anything about recruitment and retention to cleaning that data, analyzing that data writing it all up for submission. Obviously, there’s a tremendous amount of information that goes into that submission. And our projections certainly do include our current status where we are from a recruitment perspective, I think, we’re in a position where that’s not the limiting factor as we go forward.

Operator

And our next question will come from Jason [Giravi] (ph). Your line is open.

Jason Gerberry

Hey, guys. It’s Jason. Thanks for taking the question. One for Bill. Just curious how you’re thinking about KarXT indication stacking beyond where the product is currently in the clinic. This is a common playbook for CNS drugs. And I’m curious sort of the interplay with the IRA drug pricing legislation and does that, in any way, make you think differently about future development programs and perhaps maybe advancing them through your preclinical other muscarinic targeting agents just to sort of navigate — sort of the implications of IRA. I imagine that the ADP could start to tip you into IRA exposure. So just any color you can provide on that would be great? Thanks.

Bill Meury

Yes, Jason, it’s a good question. I do think you have to think about life cycle management and the portfolio holistically. And of course, the IRA is a component of it. I will just say upfront, I think it’s difficult to hide from the IRA if you’re running a biopharma company of any size.

As it relates to KarXT, look, we have potentially three indications on the drug, which will be clearly the primary drivers of value. That includes, of course, schizophrenia and adjunctive treatment indication, which I think could be served as a fundamental change in the approach of schizophrenia and an important value driver. I think we have Alzheimer’s psychosis.

There are other indications in psychosis, broadly speaking, that we’re examining, and we continue to analyze. Of course, you have Parkinson’s, there’s autism, there’s aspects of bipolar, mania that also could be interesting. And we’ll continue to analyze those opportunities and they should come into focus as we get closer to the end of the year, early 2024. I think we certainly have an indication set right now that could result in broad adoption of the psychiatry community.

As it relates to how we think about it in the context of IRA, Karuna does not have a great deal of concentration risk as it relates to the IRA. The big reason is that roughly 75% of the utilization of KarXT will be outside of Medicare Part D. And if you can consider the fact that even in the Medicare Part D channel, there’s an LIS component, which also would be an advantage for KarXT. And while an indication for Alzheimer’s psychosis could shift us more into it, I just don’t think you can’t shy away from it.

As we develop the portfolio, we do think about diversification, not just by therapeutic area or sources of growth and revenue, but also just in terms of our payer mix. And I think with a compound like our TRPC4/5, while it’s still early, we’ll have more information about that at the end of the year, early 2024, that would actually move you into depression and anxiety, where there is as much impact from the IRA.

So we just take all these factors into consideration, I think carefully, strategically about the opportunities, obviously, scientifically, and then, of course, financially, where is the best return on our investment. Thanks, Jason.

Jason Gerberry

Thanks.

Operator

And our next question comes from Neena [Britton] (ph). Your line is open.

Neena Bitritto-Garg

Hey, guys. Thanks for taking my question. So, just curious on the — going back to the cognitive data that you’re going to present in the next couple of weeks here. Can you just walk us through kind of what you would consider to be encouraging, I know you said that the data are encouraging and how it’s going to impact your plans for indication expansion? I know you did just talk a little bit about additional indications but any additional details on formal plans to conduct the NCIS would be great. Thanks.

Bill Meury

Andrew can take that question.

Andrew Miller

Sure. I maybe just take the last part first. I think it would be premature at this moment to sort of comment on exactly what the plan is going to be. I think, as Bill mentioned, there’s obviously a lot of different potential indications for KarXT.

And in some of them, we have existing initial data and some of them we have mechanistic rationale or other things. And so we’re putting all of that together in the mix. And certainly, the cognitive data as we see that from EMERGENT-2 and EMERGENT-3 will play a part in that with respect to cognition in schizophrenia.

In terms of the data itself. Yes, I think, what you should expect to see from us is the same type of analysis that we completed around the EMERGENT-1 study. Again, the study design from a dose and randomization, treatment duration is all the same in EMERGENT-1, EMERGENT-2 and EMERGENT-3.

We did make some updates to the cognitive battery that was used in EMERGENT-2 and EMERGENT-3, but is identical between EMERGENT-2 and EMERGENT-3. So that allows us to look at the individual studies as well as an aggregate of that data.

We’re obviously interested in sort of two different groups. One is the overall group of the studies. But of course, the studies were not recruited specifically on the basis of cognitive impairment. They were recruited on the basis of a total of PANSS severity assessment focused on positive symptoms.

And so one of the things that we do with EMERGENT-1 and you’ll see this again with EMERGENT-2 and EMERGENT-3 is to look specifically at the subset of patients who are on standard deviation below the mean of age, mesh, normal controls with respect to cognitive performance on the battery that we used in the study.

And so the idea being you would want to look specifically at patients that would be the target group to enroll, if you were looking specifically at cognition. We’re encouraged by the results across those groups. And again we look forward to being able to share more details here in the near future.

Bill Meury

Neena, one thing I would add, if you think about the near term, when we introduce KarXT to the psychiatry community is what we know is that KarXT does not appear to impair cognition. And in any survey of psychiatrists for patients, one thing that you hear even more commonly or frequently than impact on weight gain or EPS, which are problematic side effects of the current D2 antagonist is cognitive impairment, which could really impact functional outcomes.

So at minimum, we have something that’s not impacting cognition. I think the pro-cognitive effects, whether you look at things pre-clinically or clinically, there’s certainly a signal there. But for the launch, the real-world experience of this is also very important. I think it should be positive.

Neena Bitritto-Garg

Got it. That’s super helpful. Thank you.

Operator

And your next question comes from Laura Chico. Your line is open.

Laura Chico

Hey, good morning, guys. Thanks very much for taking the question. Bill, I’m wondering if you could speak a little bit more about recruitment trends in the schizophrenia clinical trial phase. And you made some comments about changes you’re making. And I imagine the disruption in Eastern Europe is still challenging. But are there other structural dynamics that are posing headwinds on study recruitment? And then one quick follow-up. What’s your appetite for securing a PRV for use in the KarXT filing? Thanks guys.

Bill Meury

Yes, I’ll start with the second question and probably turn the first question over to Andrew. As it relates to our PRV, I’d say we’re looking to get KarXT reviewed and approved under the most expedited path possible. And there are a number of different procedures that we can access with the FDA. Of course, the priority review actually shortens the review period. We’ll learn about that 60 days after the submission, and we’ll continue to evaluate a PRV and make a decision at the appropriate time. But clearly, speed to market here is important. I think that’s obvious, and we’ll exhaust every possibility to do that.

Andrew Miller

Yes. With respect to recruitment, specifically around studies in patients living with schizophrenia, I don’t think there’s a lot of specific factors to that at this moment. Obviously, the more studies that are ongoing from a competitive perspective, you’re competing in large part with the same sites for the same patients.

So that can’t be a factor that ebb and flows over time. But I don’t think we would point out anything specific to patients with schizophrenia at this point. There’s obviously a myriad of factors that go into the execution of any clinical study from sites to specific protocols, all sorts of different dynamics that we manage, frankly, across every clinical study that we run.

We’ve been able to, I think, very successfully execute the EMERGENT program, which includes both inpatient and outpatient studies in EMERGENT-4 and EMERGENT-5 that have recruited well, as noted by the support they’ll provide for NDA submissions here next quarter. So I don’t think we would point out anything at this point specific to schizophrenia.

Laura Chico

Thanks, guys.

Operator

And your next question comes from Jay Olson. Your line is open.

Jay Olson

Hey, congrats on all the progress, and thank you for the update. Could you talk about the adjunctive therapy setting for schizophrenia and how the novel mechanism of KarXT could be synergistic with dopamine-based atypicals and also the unmet need and size of the commercial opportunity for adjunctive therapy as compared to monotherapy of schizophrenia? Thank you.

Bill Meury

Yes, Jay, it’s a great question. Just so to set the stage a little bit. Today, we estimate 25% to 30% of patients with schizophrenia are receiving two D2 antagonist. I think that is probably the best illustration, for example, of the unmet need here. In terms of psychiatry, it’s completely intuitive to a psychiatrist to use two compounds that mechanistically are different and probably complementary, which is why we’re doing the adjunctive study.

If you look at adjunctive treatment options in other areas, for example, in depression or in Alzheimer’s, they can garner up to a third or more of a market. And so if you really were to put sort of numbers behind this, the adjunctive treatment approach in schizophrenia could be a substantial opportunity, positions patients and then, of course, commercially.

I do believe early on, psychiatrists were accustomed to polypharmacy approaches are going to use KarXT on top of a D2 antagonist. If they’re using two D2 antagonists that are pharmacologically more similar than different, I think it’s pretty clear here that the opportunity for the muscarinic class, we’re going to lead the class is pretty significant. Andrew, do you want to add?

Andrew Miller

Yes, just to add quickly, just from a scientific perspective, obviously, the pharmacology, the primary pharmacology is substantially different. And we do think there’s the opportunity for it to be complementary. Obviously, we’re exploring that as part of the ARISE program. We’ve also looked at that pre-clinically.

We presented at scientific conferences over the last 12 months or so, data where you can take a subtherapeutic dose of xanomeline and use that in combination with the subtherapeutic dose of sort of representative atypical antipsychotics namely risperidone and aripiprazole and see true synergistic benefits of preclinical models of psychosis.

And so obviously, we want to generate the human clinical trial data in ARISE to support that. But I think at first blush, scientifically, it’s intuitive, and I think we have some nice data, albeit preclinical at this stage to support that idea.

Jay Olson

Super helpful. Thank you.

Operator

Your next question comes from David Amsellem. Your line is open.

David Amsellem

Thanks. So just a couple. Can you talk about when we might see clinical work commence in mania, how you’re thinking about that? How big of a priority that is? And then secondly, as you think about life cycle management, what’s a bigger priority a long-acting injectable or getting to a once-daily oral formulation? Thank you.

Bill Meury

Yes, David, thanks. This is Bill. I’ll answer the question. As it relates to mania, it’s part of a larger analysis of additional indications beyond the three that we’re already developing. Certainly, I know that mood anxiety market fairly well. There’s certainly a psychosis component to mania, and it’s something that we’re looking at very seriously.

And I think it will come into focus, as I mentioned earlier, at the end of the year, early 2024. We have a lot on our plate right now. We can do more than one thing at a time, but our single focus right now is ensuring that the NDA is submitted on time and it’s at the highest quality. And additional indications will be sort of the next step in that. We’re certainly intellectually well down the path, but as it relates to making an operational decision. We have a little bit more work to do and think about those types of investments.

As it relates to QD dosing for the LAI, I don’t know if it’s an either/or I think if there’s an opportunity to improve the dosing of any product. You take advantage of it. Physicians want flexibility as it relates to dosing regimens and formulations. I don’t think I will say, and I’ll just turn this over to Andrew in a minute.

I don’t see BID as an impediment. I also don’t see dose type titration as anything else, but commonplace to psychiatrists. And what psychiatrists want right now is not necessarily a new dosing regimen. They want a better product with efficacy at the upper end of the range and a product with less weight gain, EPS and sedation.

And we, of course, through the EMERGENT program of dose KarXT and 1,500 patients and have three very convincing efficacy and safety trials. And if we have an opportunity to get to a different dosing regimen or a different formulation, we’ll do it. But out of the gate, as I think about creating value with KarXT, I think the data set that we have here is pretty impressive. And I think we’ve also set a fairly high bar. Andrew, do you want to talk a little bit more about LAI?

Andrew Miller

Yes, sure. I can speak to that a little bit. I mean, obviously, that continues to be a small portion but a growing portion of the overall prescription market in the US as well as outside of the US in schizophrenia. Due to something that’s of interest to us.

Obviously, from a timing perspective, the LAI is really something that you envision being used as a switch from the oral medicine. And so from our perspective, obviously, the focus out of the gate is really established. The oral products KarXT is something that can hopefully be very helpful to patients from both an efficacy and overall safety and tolerability perspective.

And to the extent we’re able to do that, which we certainly have confidence in, that will establish a potential opportunity for an LAI formulation. So it is something that we are actively working on. And hopefully we’ll be in a position if not too distant futures provide some updates about how we intend to push that into clinical development.

David Amsellem

Great. Thank you.

Operator

Your next question comes from Yatin [Sanjay] (ph). Your line is open.

Yatin Suneja

Just one question for me. Could you just talk about the size and scope of the ambulatory study? I don’t see it on clinicaltrials.gov and maybe articulate for us what are the key risks to that study? Thanks.

Bill Meury

I can speak to that a little bit. As you noted, the ABPM study is a Phase 1 study. It doesn’t require a clinicaltrial.gov listing. We have spoken previously about some of the high-level details that can recap some of that here.

The study has a target enrollment of 103 patients. It’s an eight-week study. It is one dose arm of KarXT. There’s no placebo group. The dosing of KarXT is identical to what we use in EMERGENT-1, EMERGENT-2 and EMERGENT-3. So a flexible dose, there’s a two-day titration and then 100/20 and 125/30 being the dose levels that patients will continue on after the first week, respectively.

The primary endpoint is the statistical hypothesis that KarXT is less than a 3-millimeter systolic blood pressure change from baseline to endpoint. That’s consistent with how ambulatory studies are conducted across really all indications per FDA guidance. Again, if you look at the data we’ve put out already for EMERGENT-1 and EMERGENT-2, and we’ll be able to put out additional blood pressure of vital sign data for EMERGENT-3 here of course next month.

We make measurements in EMERGENT-1, EMERGENT-2 and EMERGENT-3 at Cmax of the drug as opposed to a 24-hour average assessment, which we use in the ambulatory blood pressure monitoring study. But even if you take that data from EMERGENT-1, EMERGENT-2 and EMERGENT-3 and if we got the same thing in the ambulatory study, we would be successful on that primary endpoint.

So that’s kind of what gives us confidence that given the similarities between Emergent-1, EMERGENT-2 and EMERGENT-3 in the ambulatory study and the data we have so far, that’s why we really look at this as just a confirmation of what we’ve already seen. But doing that in a more definitive way, the same way that you would say, do a dedicated thorough QTC study, which is a typical drug development program, even though you already have ECG assessments across your entire clinical program, so we put it really in that same type of bucket.

Operator

And your next question comes from Myles Minter. Your line is open.

Myles Minter

Hi. Thanks for taking the question. Just got a few inbounds this morning on what the definition of an encouraging pre-NDA meeting is — does it pretty much just mean the part you’ve laid out to NDA is valid you’re just waiting on safety data? Or are there other things that the regulators recommended that you complete before the filing? And also in the pre-NDA meeting, did you discuss the FDA’s want for outpatient data as well as inpatient. Just now in the bulk of your clinical package has been generated in the inpatient.

Bill Meury

Great. Thanks for the question. I’ll just define positive as it’s simply — the meeting simply reinforced the key assumptions that we had for preparing the NDA and then for submitting it in the third quarter of 2023. And there’s no reading between the lines. We, of course, need to get the meeting minutes at roughly the end of this month, but the meeting is what we expected it would be, and that was reassuring to me as we have an entire team of people preparing this submission. Andrew?

Andrew Miller

Yes, I think it really spoke to the preparation plan that we had already put forward. And I think it was really a confirmation of that. So I think we feel good about that from a regulatory perspective.

Bill Meury

And could you repeat the second question?

Myles Minter

Yes. Just if you asked the question of the regulators specifically, whether they wanted to see outpatient data as well as inpatient data, just knowing the majority of your clinical package is in the inpatient setting.

Andrew Miller

Yes. Happy to speak to that. So obviously the EMERGENT program is a mix of both inpatient and outpatient studies. Importantly, 52-week safety studies in EMERGENT-4 and EMERGENT-5, which are completely outpatient.

EMERGENT-1, EMERGENT-2 and EMERGENT-3, the 5-week placebo-controlled acute psychosis studies are inpatient. That’s not reflective of anything unique to KarXT. It’s reflective of the fact that you have patients with acute psychosis and a portion of them are randomized to receive placebo. So that is the standard practice for acute psychosis studies. If you look back over the previous 20 to 30 years that inpatient placebo-controlled paradigm is the only type of study that’s been used to support registration of the current atypical medicines.

So it’s really reflective of the clinical setting and design, nothing specific to KarXT. And so said another way, the type of data we’re providing to support our NDA submission is exactly the type of data that’s been used to support the submission and approval of really all of the antipsychotics that have been approved for the last 20 years.

Myles Minter

Great. Thanks for the clarification.

Operator

Your next question comes from Jason Butler. Your line is open.

Jason Butler

Hi. Thanks for taking the question. Just a real quick follow-up on the blood pressure study. Is there any limit on — or what is the limit on patient ages being enrolled into the study? And then can you just talk a little bit about your payer engagement and how payers are thinking about a novel mechanism being introduced into schizophrenia in terms of, for example, prior authorizations in the context of monotherapy versus adjuvant therapy? Thanks.

Bill Meury

The first question?

Andrew Miller

Patient ages.

Bill Meury

Yes, sorry, go ahead. I thought you might deal with that one first.

Andrew Miller

Okay. Well, we’ll start with the payer one. So obviously, we are building our market access account team, and they have started some interactions with payers in collaboration with our medical affairs team.

I would say that the initial reaction is a positive one. They appreciate the novelty of the mechanism because it’s been so long since there has been a novelty in this class. And they also put it in the context of the overall clinical data, which we’ll be able to share with them in more detail later this year as per the pie law that allows us to have a more detailed discussion prelaunch to enable them to make early decisions about access and coverage.

And so I think the initial signs are encouraging, but it will be put in the context of the total clinical profile, et cetera. Prior authorization steps are pretty standard in this market for new psychiatric drugs. But there is some encouraging news, particularly at the state level, where states legislatures are moving to potentially reduce some of those hurdles through mandating quicker review times or by reducing utilization management techniques, such as PAs and step edits.

And so we’ll monitor that. But there seems to be a recognition that we as a society need to do more applications with serious mental illness, and that I think will play out in terms of our launch planning and how we engage both government and commercial payers.

Bill Meury

And I would add that there’s still a balanced conversation or dialogue between the companies and the payers in the area of mental health, which I think is a real positive. And the other point I would make is that if you look at the formulary coverage rates, for the currently available branded atypical antipsychotics, they’re quite high. You’re looking at 70% to 80% of formularies covering these products.

And the difference between what they’re dealing with and what we’ll deal with is we have something that is actually pharmacologically different. And so if coverage for a D2 antagonist can be secured, which is a one of 12 market, I think there’s a strong likelihood that we’re going to be able to achieve access for physicians and patients at a price that does not create budget problems for the payers and at the same time, rewards Karuna for its innovation. I think that balance we can achieve and that’s our aim.

Andrew Miller

Yes. And just quickly with respect to the ABPM study. That study enrolls patients age between 30 and 65. That’s also representative of how ABPM studies are typically done, including ones in Schizophrenia, consistent with guidance. And the idea that that’s really the age group among the 18 to 65, that typically tends to be more of the focus with respect to vital signs. I would add to that, it is also representative of the age group that we enrolled across the EMERGENT program.

That, of course, allowed patients aged 18 up to 65. When you look at the EMERGENT-1, EMERGENT-2 and EMERGENT-3 studies, they all have an average age of between 42 to 47 with the standard deviation of about 10. And so the vast majority of patients fit into that 30 to 60 age range, a relatively small number at the upper end and lower end of that range. So the ABPM study, we would expect to have a very similar age distribution to EMERGENT-1, EMERGENT-2 and EMERGENT-3.

Bill Meury

Thanks for the question.

Jason Butler

Thank you.

Operator

Your next question comes from Brian Abrahams. Your line is open.

Joseph Spak

Hi. This is Joe on for Brian. Thanks for taking our question. So we talked to several physicians, and they were all excited about the potential of KarXT to have differentiation of the cognition versus atypical. So just wondering if there are ways to highlight KarXT’s potential cognitive advantages over atypicals beyond the conference presentations. Can you potentially do additional analysis or a Phase 3 work? Or are there smaller studies that you can do and time lines for that relative to initial launch? Thank you.

Bill Meury

Yes. Listen, I think it’s a really important question. I think the answer to your question in short is yes. There are additional analyses that we will do. There are also — there is also additional clinical work that we can do. And that could be, as you said, for publication purposes, it could be investigator-initiated trial.

And then, of course, you have registration work, which would be a larger commitment and investment. I think all of those options are important. If the unmet need for an antipsychotic that has a pro-cognitive effect wasn’t so high, the answer, of course, would be different. But clearly, in every survey we’ve ever done in every advisory board we’ve ever conducted this is important, and the medical community is interested in exploring this and so are we. And I think Andrew can make a few more comments about it.

Andrew Miller

Yes. I mean I think, obviously, part of what we did across the EMERGENT-1, EMERGENT-2 and EMERGENT-3, we have the opportunity to do similar data collection analysis across ongoing and future studies as well.

So I think there continues to be additional sources of information around cognition that could be available across the next year or two. And as Bill said, I think the idea of pulling together the entire story, looking at all of the data kind of sitting down and saying, what will be the best way to continue to pursue the pro-cognitive effects of KarXT and demonstrate that in schizophrenia or other populations.

Again I think this most recent piece of deal, we are able to talk more about the details here at the end of the month with respect to EMERGENT-2 and EMERGENT-3, but it’s very nicely into that story, really reinforces the idea that again, xanomeline was originally developed as an M1 agonist for cognition, that was the original hypothesis.

Obviously, we’ve come to understand a lot about the antipsychotic effects of a dual M1, M4 agonist that want to continue to pursue the potential broad spectrum of benefits that we think it could have.

Bill Meury

Thanks for the question.

Operator

And your final question will come from Marc Goodman. Your line is open.

Rudy Li

This is Rudy on the line for Marc. Thanks for taking our question. Regarding the Alzheimer’s psychosis indication for ADEPT-1 study, can you maybe remind us the rationale for the randomized withdrawal time design? Like how to select the 12-week and 26-week duration for the two parts? And why do we select MPCI as the primary client is that of CMAI?

Andrew Miller

Yes, I can speak to that quickly. And maybe the last part first. So with respect to the CMAI, the Cohen-Mansfield Agitation Index, that isn’t a data that we collect — an endpoint that we collect as part of ADEPT-1, ADEPT-2 and ADEPT-3.

It is not the primary endpoint. CMAI is really focused on agitation and aggression as opposed to the core psychosis around hallucination and delusions of which we take the portion of NPIC, the neuropsychiatric index clinician version as our primary endpoint. That really reflects the core of psychosis as opposed to agitation and aggression, which are somewhat related, but can be, I’d say, treatable or potentially treated with different types of medicines, taking advantage of their sedative effects. So that’s sort of the rationale for that.

With respect to the randomized withdrawal design in EMERGENT-1 or sorry ADEPT-1 and then ADEPT-2 being a parallel group, double-blind placebo-controlled study, more similar to EMERGENT-1, EMERGENT-2 and EMERGENT-3. We think the two of those provide a really nice complement to each other.

The randomized withdrawal design is a very common design. It is typically used actually in schizophrenia as opposed to market commitment or something that can enable maintenance therapy labeling. It’s commonly using depression. It’s been used as a pivotal study to support substantial level of effectiveness for approval of antidepressant medicines. It tends to be a study design that is a little more resistant to potential placebo effects.

Obviously, it does require a longer protocol, 12-weeks of open-label treatment. We think that’s more than sufficient amount of time to have a clinical response on KarXT given the results of EMERGENT-1, EMERGENT-2 and EMERGENT-3 as well as the original Lilly Alzheimer’s study where you saw substantial benefits towards psychosis appearing as early as the first couple of weeks of treatment.

And then 26-week randomized withdrawal period, that’s really about allowing a long enough period of time to have a substantial number of relapse events on placebo. And when you look out there at the literature, we believe 26-weeks is more than sufficient to see that.

And so it’s really those relapsed events that is the basis of the primary endpoint analysis. So that’s just a little bit of additional background on kind of the fundamental construct of those studies and the time frames that we chose. So I appreciate that question.

Rudy Li

Got it. Thanks.

Operator

And we will now turn it back over to Bill Meury, President and CEO, for final remarks.

Bill Meury

I just want to thank everyone for joining the call and we look forward to giving you updates in the future on our progress. Thank you very much.

Operator

And this concludes today’s conference call. You may now disconnect.