Roger G. Mills
Analyst · Piper Jaffray
Thank you, Tom, and good afternoon. As Uli mentioned, we are off to a very nice start to what we expect will be a busy and exciting year for ACADIA. Our team has been focused on completing the remaining activities in our pimavanserin PDP development program that are needed for submission of an NDA. This includes aspects of the CMC development, including stability testing of pimavanserin registration batches and the remaining supportive studies, including customary drug-drug interaction studies. I'm delighted to report that our PDP development activities have continued to progress well. In our CMC program, you may recall that our initial 3 registration batches of pimavanserin were successfully manufactured at the commercial launch scale, and registration stability testing on these drug product batches was initiated last October. This registration stability program is designed to comply with ICH guidelines and to meet the regulatory filing requirements for major markets worldwide. As expected, we have now observed the initial 3 months of stability on the registration lots, appears to be consistent with what we have observed earlier with our clinical trial formulation. We have previously established long-term stability of pimavanserin on our clinical trial formulation, covering a 3-year period. This initial stability data on our registration batches, which is the same manufacturing suppliers and general processes as our clinical trial formulation, is very encouraging. Meanwhile, we have also progressed with the remaining supportive studies, which include custom and short duration drug-drug interaction, or DDI studies. I'm pleased to report that we are now in the process of filing -- of finalizing our planned DDI program, and that the profile of pimavanserin appears consistent with what we have observed in our long-term PDP safety extension studies. Patients with PDP are frequently on a number of concomitant medications. Thus, we've had the opportunity to gain a significant amount of real-life clinical experience in this patient population through our clinical trials, in particular, our open label extension studies. Importantly, we have continued to observe that pimavanserin is generally safe and well-tolerated in PDP patients. We are continuing to conduct our Phase III PDP open label safety extension trial, referred to as the -015 Study, which is designed to continue until pimavanserin is commercially available. This study has allowed us to generate a large amount of valuable, long-term safety data regarding the use of pimavanserin in patients with PDP. We've already far exceeded the ICH guidelines for required 1-year exposures, with well over 250 patients having been treated for 1 year or longer. In fact, through our -015 Study and a similar extension study tied to our earlier Phase II trial, we have well over 100 patients that have been treated with pimavanserin for at least 2 years. And our longest single patient's exposure exceeds 8 years. Our long-term safety data provides support for the potential of pimavanserin to offer significant advantages relative to current antipsychotics, frequently used off-label for the treatment of PDP. Overall, we continue to be very pleased with the progress in our PDP development program and remain on track for a planned NDA submission near the end of 2014. Consistent with our previous guidance, we plan to conduct routine pre-NDA meetings with the FDA this spring. These interactions will enable us to outline and discuss our planned submissions and how the NDA will be organized. Whilst our focus is clearly on our planned NDA submission. We also have moved forward with efforts to outline the path to registration in EU. We completed an initial series of interactions with the regulatory agencies from several EU member states. We'll continue with this process designed to clarify the pathway for registration in the EU. Let me now turn to our Alzheimer's disease psychosis or ADP program. As Uli mentioned earlier, we are currently conducting our Phase II ADP trial, which we refer to as the -019 Study. This study is a randomized double-blind placebo-controlled trial designed to examine the efficacy and safety of pimavanserin in about 200 patients with ADP. We're conducting the study through a large network of research care facilities established as part of the National Institute for Health Research Biomedical Research Centre for Mental Health at King's College London. The principal investigator is Dr. Clive Ballard, professor of age-related diseases at King's College and a renowned clinician in the field of Alzheimer's disease. In this -019 Study, patients are randomized on a one-to-one basis to receive either 40 mg of pimavanserin or placebo, once daily for 12 weeks, following an initial 3-week screening period that includes brief psychosocial therapy. The study is designed to assess several key efficacy endpoints, including the use of the Neuropsychiatric Inventory Nursing Home, or NPI-NH scale, to measure psychosis, agitation aggression and sleep nighttime behavior, as well as additional exploratory endpoints. The key efficacy endpoints were based on the change of week 6 from baseline, which is a standard duration for psychosis studies. A full 12-week treatment period will allow us to explore additional endpoints, including the cognitive status of patients. We were looking to show that we do not worsen cognition relative to placebo-treated patients. In contrast, currently marketed antipsychotics have been linked to cognitive decline in elderly patients with dementia related psychosis. The 12-week treatment period will also provide the opportunity for demonstration of durability of response to pimavanserin beyond the 6-week placebo-controlled period tested in our pivotal PDP efficacy trial and the key efficacy endpoints in the -019 Study. We've been very pleased with the study starter and the overall commitment shown by King's College clinical organization. We believe that conducting the study at this high-quality medical institution with its network of nursing care homes and its experience in this patient population provide several advantages in study execution. Firstly, we were able to incorporate many design features from our successful pivotal PDP trial into the -019 Study design. Importantly, the geographically focused network of care facilities enable the use of a small group of highly trained raters, which we expect will enhance study precision. Secondly, we believe this unique clinical research infrastructure and expertise provide access to a pool of well-characterized ADP patients, and facilitates data management and monitoring. We continue to believe that this study positions us with the unique opportunity to demonstrate the potential benefits of pimavanserin in this patient population and to inform us on design for future studies in this program. Beyond ADP, we are currently planning for additional studies as part of our life cycle management program to further characterize potential aspect -- aspects of pimavanserin's clinical profile and to position it for other indications. This includes development planning and related commercial assessments of the various markets of pimavanserin. One such indication, where we believe pimavanserin may play a beneficial role, is schizophrenia. Pimavanserin's selected blockade of the 5-HT2A receptor may enable it to be used in 2 different treatment approaches to improve the therapy for patients with schizophrenia. Firstly, it may be used as a co-therapy, together with low doses of existing atypical antipsychotic drugs such as risperidone, to enhance the clinical profile as demonstrated in our earlier Phase II trial. Secondly, in the maintenance space of schizophrenia therapy, we believe that a selective 5-HT2A treatment may allow for symptom control whilst avoiding interactions with dopamine and other receptors that are linked to many of the side effects caused by existing antipsychotics. With its selected profile, we therefore believe that pimavanserin has the potential to be used as a standalone treatment in order to provide a well-tolerated maintenance therapy that may result in better compliance of schizophrenia patients. We look forward to sharing more details on these planned studies in our life cycle management program later this year. I'll now turn the call back over to Uli.