About atenolol
Beta-1 selective beta blocker
Used for
- High blood pressure and angina (usually tablets)
- Certain abnormal heart rhythms
- Heart attack treatment in selected patients
Usual adult dose
Injection dosing varies by indication and requires monitored administration; usual oral doses are 25–100 mg once daily.
Common side effects
- Slow heart rate
- Low blood pressure or dizziness
- Tiredness
- Cold hands or feet
Important warnings
- May worsen heart failure or cause dangerously slow heartbeat.
- Avoid abrupt withdrawal after long-term use.
- Can mask warning signs of low blood sugar.
- Injection requires medical supervision and heart-rate monitoring.
Pregnancy
Use only when clearly needed; may affect fetal growth and newborn heart rate or blood sugar.
Breastfeeding
Small amounts enter breast milk; monitor infants for slow heartbeat or poor feeding.
Interactions
- Other medicines that slow heart rate, such as verapamil or diltiazem
- Insulin and other diabetes medicines
- Clonidine
- Some anesthetics and antiarrhythmics
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.