Kate Beebe
Analyst · Westside Investment Management
Hi. Thank you, Sunil, and thanks to all of you joining us today. As Marc mentioned, in July and August of last year, Titan announced positive top line results for our Phase III confirmatory study of Probuphine for the treatment of opioid dependence as well as additional positive results demonstrating significant overall patient improvement, a very good safety profile and an overall clinical profile similar to the approved drug, Suboxone. In building on its findings, Titan announced the results of our open-label, 6-month safety retreatment study known as PRO-811 in patients with opioid dependence in February of this year. This was the fifth and final trial to be completed as part of our Phase III development program for Probuphine. This safety retreatment study enrolled 85 patients at 18 clinical sites and provided 6 months of open-label treatment with Probuphine.
Study protocol included standard safety monitoring of patients similar to what we've done in previous clinical studies, including the evaluation of opioid withdrawal and opioid craving symptoms, as well as patient's self-report of illicit drug use.
Additionally, this particular study also included a patient satisfaction survey that was completed by 53 of the 67 patients who finished the study, and the highlights are as follows: Essentially overall, more than 80% of eligible patients from the confirmatory Phase III clinical trial consented for treatment in this follow-on safety study. And of these, 86% of the patients who had previously been treated with Probuphine consented for retreatment. Our patients in the Phase III trial, you'll remember, received Probuphine or placebo implants for open-label sublingual buprenorphine.
Also, 67 patients or 79% completed the 6-month retreatment study with more than 90% of the completers indicating that if given the option, they would elect to receive further treatment with Probuphine. And at the end of treatment in this study, 80% of patients who reported that they had not used illicit opioids within the last 2 weeks.
According to patient-recorded data as well as clinician assessments, symptoms of opioid withdrawal were also well controlled during the study, with patients reporting that their opioid cravings were well controlled, and nearly 95% of patients reporting that they were able to improve their lives while taking part in the study.
And overall, Probuphine was well tolerated, including the implant insertion and removal procedures. But the most common adverse events reported things like headache at 12%; upper respiratory infection at 8%; back pain, 6%; and urinary tract infection at 6%.
On the regulatory front as Marc has mentioned, we've confirmed the regulatory pathway for Probuphine with the FDA. And we're now working to complete the analytical testing of Probuphine to provide additional CMC data as requested by the FDA; the manufacturing facility expansion and qualification for commercial scale production of Probuphine; and the preparation of integrated clinical data, the summary reports and electronic document preparation are all on track to file our NDA in the third quarter of this year.
As you know, we've presented our Probuphine clinical data at several national and international scientific conferences and meetings. And for upcoming presentations, I'll be at the American Society of Addiction Medicine or ASAM, 43rd Annual Medical-Scientific Conference at Atlanta next month, where I'll present a poster on the Probuphine Phase III data, including the findings from our recent PRO-811 open label safety retreatment study. And this presentation is scheduled for April 20 at 1:30 p.m. Eastern time.
We're also continuing to pursue future presentations and publications of the data, which we will update you on as appropriate.
Ultimately, our goal is to deliver a safe and effective treatment option for patients with opioid dependence, and these recent clinical and regulatory advances continue to move us forward towards that goal.
Now I'd like to turn the call back over to Sunil, and I would be happy to address your questions. Sunil?