A secondary outcome measure included the responder rate (proportion of patients with greater than or equal to 50% reduction from baseline in partial seizure frequency). The following figure displays responder rate by dose for two of the studies.

Figure 6: Responder rate by add-on epilepsy study

Figure 6
Figure 7: Seizure Reduction by Dose (All Partial Onset Seizures) for Studies E1, E2, and E3

Figure 7
Subset eva luations of the antiseizure efficacy of LYRICA showed no clinically important differences as a function of age, gender, or race.

14.4 Management of Fibromyalgia
The efficacy of LYRICA for management of fibromyalgia was established in one 14-week, double-blind, placebo-controlled, multicenter study (F1) and one six-month, randomized withdrawal study (F2). Studies F1 and F2 enrolled patients with a diagnosis of fibromyalgia using the American College of Rheumatology (ACR) criteria (history of widespread pain for 3 months, and pain present at 11 or more of the 18 specific tender point sites). The studies showed a reduction in pain by visual analog scale. In addition, improvement was demonstrated based on a patient global assessment (PGIC), and on the Fibromyalgia Impact Questionnaire (FIQ).

Study F1: This 14-week study compared LYRICA total daily doses of 300 mg, 450 mg and 600 mg with placebo. Patients were enrolled with a minimum mean baseline pain score of greater than or equal to 4 on an 11-point numeric pain rating scale and a score of greater than or equal to 40 mm on the 100 mm pain visual analog scale (VAS). The baseline mean pain score in this trial was 6.7. Responders to placebo in an initial one-week run-in phase were not randomized into subsequent phases of the study. A total of 64% of patients randomized to LYRICA completed the study. There was no evidence of a greater effect on pain scores of the 600 mg daily dose than the 450 mg daily dose, but there was evidence of dose-dependent adverse reactions [see ADVERSE REACTIONS (6.1)]. Some patients experienced a decrease in pain as early as Week 1, which persisted throughout the study. The results are summarized in Figure 8 and Table 9.

For various levels of improvement in pain intensity from baseline to study endpoint, Figure 8 shows the fraction of patients achieving that level of improvement. The figure is cumulative. 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 8: Patients Achieving Various Levels of Improvement in Pain Intensity – Fibromyalgia Study F1

Figure 8
Table 9. Patient Global Response in Fibromyalgia Study F1
Patient Global Impression of Change
Treatment Group
(mg/day) % Any Improvement 95% CI
PGB = Pregabalin
Placebo 47.6 (40.0,55.2)
PGB 300 68.1 (60.9, 75.3)
PGB 450 77.8 (71.5, 84.0)
PGB 600 66.1 (59.1, 73.1)
Study F2: This randomized withdrawal study compared LYRICA with placebo. Patients were titrated during a 6-week open-label dose optimization phase to a total daily dose of 300 mg, 450 mg, or 600 mg. Patients were considered to be responders if they had both: 1) at least a 50% reduction in pain (VAS) and, 2) rated their overall impr