Nadolol side effects?

Nadolol is a non-selective beta-blocker, so its side effects come from blocking beta receptors in the heart and lungs. Common and serious ones are listed below.

Common side effects (may affect more than 1 in 100 people)
- Fatigue or tiredness
- Dizziness or lightheadedness
- Slow heart rate (bradycardia)
- Low blood pressure (hypotension) and related dizziness or fainting
- Cold hands/feet or feeling generally chilly
- Upset stomach, nausea, diarrhea
- Headache
- Sleep disturbances or trouble sleeping
- Sexual difficulties (e.g., reduced libido)

Less common or less frequent side effects
- Cough or wheezing, especially in people with asthma or COPD (nadolol is non-selective and can affect the lungs)
- Dry mouth
- Skin rashes or itching (rare)

Serious but less common side effects (seek medical help promptly)
- Very slow or irregular heartbeat, chest pain, fainting
- Signs of heart failure (swelling of ankles/feet, shortness of breath, sudden weight gain)
- Severe bronchospasm or breathing difficulties (especially with asthma/COPD)
- Severe allergic reactions (rash with swelling, trouble breathing)
- Severe hypoglycemia symptoms masked (diabetics may not notice low blood sugar as easily)

Important notes
- Do not stop nadolol abruptly; taper if you need to discontinue, under your doctor’s guidance.
- People with asthma/COPD or diabetes may have special considerations (bronchospasm risk; masking of hypoglycemia symptoms). Discuss with your clinician if you have these conditions.
- If you notice severe dizziness, very slow heartbeat, chest pain, trouble breathing, or signs of an allergic reaction, seek medical attention right away.

If you’d like, tell me your dose, any other meds you’re taking, or whether you have conditions like asthma, COPD, or diabetes, and I can tailor the information more specifically. This is general information and not a substitute for medical advice.