Tenolat sr is a combination of atenolol
beta blocker
and nifedipine (calcium channel blocker)nifedipine is a dihydropyridine derivative (a member of slow calcium channel blocker)has cardioprotective properties due to peripheral vasodialator effect and direct coronary vasodilator effect thus increases blood flow to myocardium and improves oxygen supply to the hear.it inhibits calcium ions diffusion into the cells of muscle fibers thus leading to dilatation of the blood vessels.atenolol is a hydrophilic beta blocker, it reduces the rate and force of contraction of the heart, decreases the rate of conduction of impulses through the conducting system, reduces the response of the heart to stress and evercise, lowers the blood pressure by blocking the action of the nervous system on the heart and reduces the force of the heart musclestenolat sr is a pioneer combination of beta blocker and calcium channel blocker which leads potentiate their actions and minimizes their