Tenormin is used to treat angina (chest pain) and hypertension (high blood pressure). Tenormin is used for decreasing death due to heart problems after a heart attack. Tenormin is a beta-blocker. Exactly how Tenormin works to decrease heart problems after a heart attack is not known.
Use Tenormin as directed by your doctor.
- Do not take Tenormin in larger amounts or for longer than recommended by your doctor.
- Take Tenormin with a full glass of water.
- Take Tenormin at the same time every day.
- Do not skip doses or stop taking Tenormin without first talking to your doctor. Stopping suddenly may make your condition worse.
- To be sure this medication is helping your condition, your blood pressure will need to be checked on a regular basis. It is important that you not miss any scheduled visits to your doctor.
- If you need to have any type of surgery, tell the surgeon that you are using Tenormin. You may need to briefly stop using Tenormin before having surgery.
- Tenormin is only part of a complete program of treatment for hypertension that may also include diet, exercise, and weight control. Follow your diet, medication, and exercise routines very closely if you are being treated for hypertension.
- Hypertension often has no symptoms, so you may not even feel that you have high blood pressure. Continue using this medicine as directed, even if you feel well. You may need to use blood pressure medication for the rest of your life.
Ask your health care provider any questions you may have about how to use Tenormin.
Store Tenormin at room temperature away from moisture and heat. Keep Tenormin out of the reach of children and away from pets.
Active Ingredient: Atenolol.
Do NOT use Tenormin if:
- you are allergic to any ingredient in Tenormin
- you have a very slow heartbeat, heart block, uncontrolled heart failure, shock caused by serious heart problems, or low blood pressure after a heart attack
- you have an untreated adrenal gland tumor (pheochromocytoma)
- you are taking mibefradil.
Contact your doctor or health care provider right away if any of these apply to you.
Tell your health care provider if you have any medical conditions, especially if any of the following apply to you:
- if you are pregnant, planning to become pregnant, or are breast-feeding
- if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
- if you have allergies to medicines, foods, or other substances
- if you have a history of any severe allergic reaction
- if you have a history of lung or breathing problems (eg, asthma, chronic bronchitis, chronic obstructive pulmonary disease [COPD], emphysema), heart problems (eg, heart failure, conduction problems, left ventricle problems), blood vessel problems, diabetes, kidney problems, an adrenal gland tumor, or an overactive thyroid.
Some medicines may interact with Tenormin. Tell your health care provider if you are taking any of the following medicines.
- Clonidine because the risk of severe high blood pressure may be increased
- Mefloquine because the risk of irregular heartbeat may be increased
- Amiodarone, calcium channel blockers (eg, diltiazem, verapamil), catecholamine-depleting medicines (eg, reserpine), digoxin, disopyramide, flecainide, ketanserin, mibefradil, or quinidine because they may increase the risk of Tenormin’s side effects
- Indomethacin or phenylpropanolamine because it may decrease Tenormin’s effectiveness
- Bupivacaine, lidocaine, or quinazolines (eg, alfuzosin) because the risk of their side effects may be increased by Tenormin.
This may not be a complete list of all interactions that may occur. Ask your health care provider if Tenormin may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.