Metoprolol tartrate is a selective β
1-adrenoceptor antagonist (β
1-blocker) which lacks intrinsic sympathomimetic activity (ISA). Metoprolol tartrate is widely used for the treatment of mild to moderate hypertension and angina pectoris. Metoprolol is metabolised by cytochrome P-450 (CYP) isoenzymes CYP2D6 in liver. Controlled release formulations of metoprolol tartrate, and combined of metoprolol tartrate and felodipine [
F0814] (a selective dihydropyridine Ca
2+ channel antagonist) have been reported. (The product is for research purpose only.)