About diltiazem hydrochlo ride
Calcium-channel blocker (non-dihydropyridine)
Used for
- High blood pressure
- Angina (chest pain)
- Certain abnormal heart rhythms, such as atrial fibrillation
Usual adult dose
Usually 120–360 mg once daily for extended-release tablets; dose depends on the condition and formulation.
Common side effects
- Swollen ankles
- Headache or dizziness
- Flushing
- Slow heartbeat
Important warnings
- Can excessively slow the heart or lower blood pressure.
- Use caution with heart failure or conduction problems.
- Do not crush or chew extended-release tablets.
- Do not stop suddenly without medical guidance.
Pregnancy
Use only when clearly needed; pregnancy safety is not well established.
Breastfeeding
Small amounts enter breast milk; discuss use with a healthcare professional, especially for newborns.
Interactions
- Beta blockers or digoxin can further slow the heart.
- Grapefruit may increase diltiazem levels.
- Diltiazem can interact with statins, including simvastatin.
- Some antibiotics and antifungals can raise diltiazem levels.
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 It may be incomplete or out of date.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.