ell than patients with creatinine clearance greater than 60 mL/min as evidenced by markedly higher rates of discontinuation due to adverse reactions. For various levels of improvement in pain intensity from baseline to study endpoint, Figure 5 shows the fraction of patients achieving that level of improvement. The figure is cumulative, so that patients whose change from baseline is, for example, 50%, are also included at every level of improvement below 50%. Patients who did not complete the study were assigned 0% improvement. Some patients experienced a decrease in pain as early as Week 1, which persisted throughout the study.
Figure 5: Patients Achieving Various Levels of Improvement in Pain Intensity– Study PHN 3
Figure 5
14.3 Adjunctive Therapy for Adult Patients with Partial Onset Seizures
The efficacy of LYRICA as adjunctive therapy in partial onset seizures was established in three 12-week, randomized, double-blind, placebo-controlled, multicenter studies in adult patients. Patients were enrolled who had partial onset seizures with or without secondary generalization and were not adequately controlled with 1 to 3 concomitant antiepileptic drugs (AEDs). Patients taking gabapentin were required to discontinue gabapentin treatment 1 week prior to entering baseline. During an 8-week baseline period, patients had to experience at least 6 partial onset seizures with no seizure-free period exceeding 4 weeks. The mean duration of epilepsy was 25 years in these 3 studies and the mean and median baseline seizure frequencies were 22.5 and 10 seizures per month, respectively. Approximately half of the patients were taking 2 concurrent AEDs at baseline. Among the LYRICA-treated patients, 80% completed the double-blind phase of the studies.
Table 8 shows median baseline seizure rates and median percent reduction in seizure frequency by dose.
Table 8. Seizure Response in Controlled, Add-On Epilepsy Studies
Daily Dose of Pregabalin Dosing Regimen N Baseline Seizure Frequency/mo Median % Change from Baseline p-value, vs. placebo
Study E1
Placebo BID 100 9.5 0
50 mg/day BID 88 10.3 -9 0.4230
150 mg/day BID 86 8.8 -35 0.0001
300 mg/day BID 90 9.8 -37 0.0001
600 mg/day BID 89 9.0 -51 0.0001
Study E2
Placebo TID 96 9.3 1
150 mg/day TID 99 11.5 -17 0.0007
600 mg/day TID 92 12.3 -43 0.0001
Study E3
Placebo BID/TID 98 11 -1
600 mg/day BID 103 9.5 -36 0.0001
600 mg/day TID 111 10 -48 0.0001
In the first study (E1), there was evidence of a dose-response relationship for total daily doses of Lyrica between 150 and 600 mg/day; a dose of 50 mg/day was not effective. In the first study (E1), each daily dose was divided into two equal doses (twice a day dosing). In the second study (E2), each daily dose was divided into three equal doses (three times a day dosing). In the third study (E3), the same total daily dose was divided into two equal doses for one group (twice a day dosing) and three equal doses for another group (t
