<unk> (capsule) is a beta-adrenergic blocker that is FDA approved for the treatment of hypertension, angina pectoris, migraine, hypertrophic subaortic stenosis. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include dermatitis, pruritus, diarrhea, dizziness, sleep disorder, fatigue.
Propranolol 
Bupranolol
Methazolamide
Brotizolam
Penbutolol
Clopamide
Clonidine
Metipranolol