Neurology

One-year sustained efficacy of erenumab in episodic migraine: Results of the STRIVE study



Objective

To assess efficacy and tolerability of 1-year erenumab treatment in patients with episodic migraine.

Methods

Patients were randomized (n = 955; 1:1:1) during the 24-week double-blind treatment phase (DBTP) to monthly subcutaneous placebo or erenumab 70 or 140 mg. At week 24, 845 patients were rerandomized (1:1) to erenumab 70 or 140 mg during the 28-week dose-blinded active-treatment phase (ATP). Monthly migraine days (MMD), achieving ≥50%, ≥75%, and 100% reduction in MMD, and safety/tolerability were assessed.

Results

Mean MMD at DBTP baseline was 8.3. At week 52, mean changes (SE) from pre-DBTP baseline/week 24 (pre-ATP baseline) in MMD were –4.2 (0.2)/–1.1 (0.2) (70 mg) and –4.6 (0.2)/–1.8 (0.2) (140 mg) irrespective of treatment during the DBTP. For patients reducing dose from 140 (DBTP) to 70 mg (ATP), change in MMD from week 24 to 52 was –0.1 (0.3), and for those increasing from 70 (DBTP) to 140 mg (ATP), –1.8 (0.3). At week 52, 61.0%, 38.5%, and 19.8% of patients on erenumab 70 mg, and 64.9%, 40.8%, and 21.2% on erenumab 140 mg, achieved ≥50%, ≥75%, and 100% reduction in MMD from DBTP baseline, respectively. Among erenumab-treated patients in DBTP who showed ≥50% reduction in MMD during the last 3 months of DBTP and completed ATP, 86% showed sustained responses at ≥50% during the last 3 months of ATP. Safety of erenumab in ATP was similar to DBTP; exposure-adjusted incidence rates of adverse events were similar for either dose.

Conclusion

Over 52 weeks, erenumab provided sustained efficacy in episodic migraine; the safety profiles were similar between erenumab dose groups in the presence of dose blinding.

Clinicaltrials.gov identifier

NCT02456740.

Classification of evidence

Class II evidence that 52 weeks of treatment with erenumab 70 and 140 mg subcutaneously monthly results in sustained reductions in monthly migraine days and similar dose tolerability for patients with episodic migraine.

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