<p>The most common side effects reported for patients treated with Mirabegron 50 mg during the three 12-week phase 3 double blind, placebo controlled studies are tachycardia and urinary tract infections. The frequency of tachycardia was 1.2% in patients receiving Mirabegron 50 mg. Tachycardia led to discontinuation in 0.1% patients receiving Mirabegron 50 mg. The frequency of urinary tract infections was 2.9% in patients receiving Mirabegron 50 mg. Urinary tract infections led to discontinuation in none of the patients receiving Mirabegron 50 mg. Serious adverse reactions included atrial fibrillation (0.2%).</p>