atenolol, Tenormin (cont.)

Pharmacy Author:
Medical and Pharmacy Editor:

DOSING:

  • The dose for treating high blood pressure or angina is 25-100 mg once daily.
  • Acute myocardial infarction (heart attack) is treated with two 5 mg injections administered 10 minutes apart followed by treatment with 100 mg oral atenolol for 6-9 days. If atenolol injections are not appropriate, patients may be treated with 100 mg daily of oral atenolol for 7 days.

DRUG INTERACTIONS: Calcium channel blockers (CCBs) and digoxin (Lanoxin) can cause lowering of blood pressure and heart rate to dangerous levels when administered together with atenolol. Atenolol can mask the early warning symptoms of low blood sugar (hypoglycemia), and should be used with caution in patients receiving treatment for diabetes.

PREGNANCY: Atenolol may cause harm and growth retardation in the fetus when given to pregnant women.

NURSING MOTHERS: Atenolol is excreted in breast milk and my cause adverse effects in an infant being breastfed.

SIDE EFFECTS: Atenolol is generally well tolerated, and side effects are mild and transient. Rare side effects include abdominal cramps, diarrhea, constipation, fatigue, insomnia, nausea, depression, dreaming, memory loss, fever, impotence, lightheadedness, slow heart rate, low blood pressure, numbness, tingling, cold extremities, and sore throat.

Medically Reviewed by a Doctor on 7/30/2014


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