Tenormin is in a group of drugs called beta-blockers. Beta-blockers affect the heart and circulation (blood flow through arteries and veins). It is used to treat angina (chest pain) and hypertension (high blood pressure). It is also used to treat or prevent heart attack.
Before taking atenolol you should tell your doctor if you have: asthma, bronchitis, emphysema, diabetes, low blood pressure, a heart problem, depression, liver or kidney disease, thyroid disorder, myasthenia gravis, pheochromocytoma or problem with circulation because if you have any of this conditions, you may not be able to use atenolol or you may need a dosage adjustments. Do not use atenolol if you are pregnant. Atenolol can pass into breast milk and may harm a nursing baby.
Atenolol is available as tablet, injectable or solution. Take atenolol exactly as it was prescribed for you with a full glass of water. Take it at the same time every day. Take the missed dose as soon as you remember. Do not take the extra medicine to make up the missed dose. Store atenolol at room temperature away from moisture and heat.
Symptoms of an atenolol overdose may include uneven heartbeats, shortness of breath, bluish-colored fingernails, dizziness, weakness, fainting or seizure. Seek medical attention if you think you have used too much of this medicine and experiencing symptoms of overdosing.
Get emergency medical help if you have any of these signs of allergic reaction: hives, difficulty breathing, swelling of face, lips, tongue or throat. Some of the serious side effects of atenolol includes: slow or uneven heartbeats, feeling light-headed, feeling shortness of breath, swelling of ankles, or feet, nausea, stomach pain, low fever, loss of appetite, dark urine, jaundice, depression or cold feeling in hands and feet. Atenolol can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert. Avoid drinking alcohol, which could increase drowsiness and dizziness while you are taking atenolol.
Do not stop taking atenolol without first talking to your doctor. Stopping suddenly may make your condition worse. If you have any type of surgery, you may need to temporarily stop using atenolol but be sure the surgeon knows ahead of the time that you are using atenolol. 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.
TENORMIN (atenolol), a synthetic, beta1-selective (cardioselective) adrenoreceptor blocking agent, may be chemically described as benzeneacetamide, 4 -[2'-hydroxy-3'-[(1- methylethyl) amino] propoxy]-. TENORMIN is available as 25, 50 and 100 mg tablets for oral administration.
Tenormin has the following structural formula: