Atenolol, or Tenormin, is one of a group of medicines is known as beta-adrenergic blocking agents, beta-blocking agents, or beta-blockers. Atenolol is used in the treatment of high blood pressure, used to relieve angina, and in heart attack patients to help prevent additional heart attacks. Atenolol is also used to correct irregular heartbeat, prevent migraine headaches, and to treat tremors.
Be sure to tell your doctor of any allergies you have whether it is to medication or food, preservatives, or dyes. Tell your doctor immediately if you are, or become pregnant, or are breastfeeding. Also, tell your doctor of any other medications you are taking, including vitamins and supplements, and any medical conditions you may have.
It is very important that you take this medicine exactly as your doctor tells you to. If you miss a dose of this medicine, take it as soon as you remember, unless it is within four hours of your next dose. Do NOT double doses.
Talk to your doctor as soon as possible if any of the following side effects occur: breathing difficulty and/or wheezing; cold hands and feet; mental depression; shortness of breath; slow heartbeat (especially less than 50 beats per minute); swelling of ankles, feet, and/or lower legs; back pain or joint pain; chest pain; confusion (especially in elderly patients); dizziness or lightheadedness when getting up from a lying or sitting position; fever and sore throat; hallucinations; irregular heartbeat; red, scaling, or crusted skin; skin rash; or unusual bleeding and bruising.
TENORMIN (atenolol), a synthetic, beta1-selective (cardioselective) adrenoreceptor blocking agent, may be chemically described as benzeneacetamide, 4 -[2'-hydroxy-3'-[(1- methylethyl) amino] propoxy]-. Atenolol (free base) has a molecular weight of 266. It is a relatively polar hydrophilic compound with a water solubility of 26.5 mg/mL at 37°C and a log partition coefficient (octanol/water) of 0.23. It is freely soluble in 1N HCl (300 mg/mL at 25°C) and less soluble in chloroform (3 mg/mL at 25°C).
TENORMIN is available as 25, 50 and 100 mg tablets for oral administration.
Inactive Ingredients: Magnesium stearate, microcrystalline cellulose, povidone, sodium starch glycolate.
The molecular and structural formulas are: