Note: This document contains side effect information about atenolol. Some of the dosage forms listed on this page may not apply to the brand name Tenormin.
Common side effects of Tenormin include: cardiac failure, bradycardia, dizziness, fatigue, and cold extremity. See below for a comprehensive list of adverse effects.
Applies to atenolol: oral tablet
Oral route (Tablet)
Following abrupt cessation of certain beta-blocking agents, exacerbations of angina pectoris and, in some cases, myocardial infarction and ventricular arrhythmias have occurred. As with other beta blockers, when discontinuation of atenolol is planned, the patients should be carefully observed and advised to minimize physical activity. If the angina worsens or acute coronary insufficiency develops, promptly reinstitute atenolol, at least temporarily. Warn patients against interruption or discontinuation of therapy without advice of physician
Along with its needed effects, atenolol (the active ingredient contained in Tenormin) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur while taking atenolol:
Incidence not determined
Get emergency help immediately if any of the following symptoms of overdose occur while taking atenolol:
Symptoms of overdose
Some side effects of atenolol may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Incidence not determined
Applies to atenolol: compounding powder, injectable solution, oral tablet
The more commonly reported side effects associated with this drug are hypotension, tiredness, and dizziness.
Bradycardia and hypotension were reported more frequently in patients following a myocardial infarction than among those receiving the drug for treatment of hypertension. In a large study, after a myocardial infarction, patients were more likely to reduce the dosage or discontinue this drug due to bradycardia and hypotension.
Common (1% to 10%): Bradycardia, hypotension, cold extremities, heart failure deterioration, heart block precipitation, postural hypotension with or without syncope
Rare (0.01% to 0.1%): Intermittent claudication exacerbation, Raynaud's phenomenon
Frequency not reported: Left ventricular insufficiency
Postmarketing reports: Sick sinus syndrome
Very common (10% or more): Tiredness (up to 26%)
Common (1% to 10%): Fatigue
Frequency not reported: Malaise, tinnitus
Very common (10% or more): Dizziness (up to 13%)
Common (1% to 10%): Vertigo, lightheadedness, lethargy, drowsiness
Rare (0.01% to 0.1%): Headache, paresthesia
Frequency not reported: Ataxia
Very common (10% or more): Depression (up to 12%)
Common (1% to 10%): Dreaming
Uncommon (0.1% to 1%): Sleep disturbances,
Rare (0.01% to 0.1%): Mood changes, nightmares, confusion, psychoses, hallucinations
Frequency not reported: Vivid dreams, insomnia
Common (1% to 10%): Wheezing, dyspnea, pulmonary emboli
Rare (0.01% to 0.1%): Bronchospasm
Frequency not reported: Asthma, nasal congestion
Common (1% to 10%): Gastrointestinal disturbances, diarrhea, nausea
Rare (0.01% to 0.1%): Dry mouth
Frequency not reported: Indigestion, constipation
Common (1% to 10%): Leg pain
Uncommon (0.1% to 1%): Transaminase level elevation
Rare (0.01% to 0.1%): Hepatic toxicity including intrahepatic cholestasis
Postmarketing reports: Elevated bilirubin
Uncommon (0.1% to 1%): Renal failure
Frequency not reported: Increased blood urea, increased serum creatinine
Rare (0.01% to 0.1%): Purpura, alopecia, psoriasiform skin reactions, psoriasis exacerbations, skin rash
Rare (0.01% to 0.1%): Impotence
Postmarketing reports: Peyronie's disease
Rare (0.01% to 0.1%): Thrombocytopenia
Rare (0.01% to 0.1%): Dry eyes, visual disturbances
The clinical significance of elevated ANA levels is unknown.
Very rare (less than 0.01%): Increase in antinuclear antibodies (ANA)
Frequency not reported: Angioedema, urticaria
Medically reviewed by BestRx Medical Team Last updated on 1/1/2020.
Source: Drugs.com Tenormin