About nifedipine
Calcium channel blocker
Used for
- High blood pressure
- Angina (chest pain)
Usual adult dose
Usually 30–60 mg once daily; dose is adjusted according to response and formulation.
Common side effects
- Headache
- Flushing
- Ankle swelling
- Dizziness
Important warnings
- Swallow tablets whole; do not crush or chew.
- May cause low blood pressure or worsen chest pain, especially when starting or increasing treatment.
- Avoid grapefruit and grapefruit juice.
- Do not stop treatment suddenly without medical guidance.
Pregnancy
Use only when prescribed; treatment choice depends on the situation and pregnancy stage.
Breastfeeding
Small amounts enter breast milk; it is generally considered compatible with breastfeeding when clinically needed.
Interactions
- Grapefruit can increase nifedipine levels.
- Rifampicin can greatly reduce nifedipine levels.
- Some antifungals, antibiotics, and HIV medicines can increase nifedipine levels.
- Other blood-pressure-lowering medicines may increase dizziness or low blood pressure.
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 It may be incomplete or out of date.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.