<unk> , sold under the brand names Sectral among others, is a beta blocker for the treatment of hypertension and arrhythmias.<unk>  is a cardioselective beta-1 blocker and has intrinsic sympathetic<unk> tivity. It is commonly used in the treatment of angina. It was patented in 1967 and approved for medical use in 1973.
Acebutolol
Hydrastine
Tolbutamide
Prazosin
Phenylephrine
Telmisartan
Sildenafil
Metergoline