Tenormin 25mg tablets contain atenolol, a beta-blocker medication used to treat high blood pressure, angina, and certain heart rhythm disorders. Each pack contains 28 tablets manufactured by AstraZeneca, with each tablet containing 25mg of the active ingredient atenolol. Tenormin belongs to a group of medicines called beta-blockers. It works by slowing down the heart rate and making it easier for the heart to pump blood around the body. The tablets should be taken as prescribed by your healthcare provider, typically once daily. The distinctive packaging features a mint green and purple color scheme with the AstraZeneca logo. This is a prescription-only medication that requires medical supervision. Store at room temperature away from moisture and direct sunlight.