The generic name of this medication is Atenolol and brand name is Tenormin. The active ingredient of this medication is Atenolol and inactive ingredient is Magnesium Stearate. Atenolol is manufactured by Geneva/Sandoz. Mainly used to decrease fatalities due to heart problems after a heart attack.

Atenolol is a drug belonging to the group of beta blockers, a class of drugs used primarily in cardiovascular diseases. Introduced in 1976, atenolol was developed as a replacement for propranolol in the treatment of hypertension. Propranolol is known to readily cross the blood-brain barrier (BBB) and can pass into the brain, causing side-effects such as depression and nightmares; atenolol was specifically developed to be unable to pass through the blood-brain barrier in order to prevent this effect. Whilst atenolol, the most widely used beta-blocker in the United Kingdom, was once the first-line treatment for hypertension, the role for beta-blockers in hypertension was downgraded in June 2006 in the United Kingdom to fourth-line as they perform less well than other drugs, particularly in the elderly, and there is increasing evidence that the most frequently used beta-blockers at usual doses carries an unacceptable risk of provoking type 2 diabetes.