About nifedipine
Calcium channel blocker
Used for
- High blood pressure
- Angina (chest pain)
- Raynaud phenomenon, in some cases
Usual adult dose
Dose depends on the formulation and condition; oral liquid dosing must follow its specific product instructions.
Usual dose in children
Specialist-directed dosing only; not routinely used in children.
Common side effects
- Headache, flushing, dizziness
- Swollen ankles
- Fast heartbeat or palpitations
- Nausea or constipation
Important warnings
- Do not use for sudden angina attacks.
- Swallow modified-release products whole; do not crush or chew.
- Low blood pressure may cause fainting.
- Do not stop regular treatment without medical guidance.
Pregnancy
Use only when considered necessary by a clinician; pregnancy guidance depends on the condition and formulation.
Breastfeeding
Small amounts may enter milk; use is generally considered compatible, with clinical review.
Interactions
- Grapefruit may increase nifedipine levels.
- Some antibiotics and antifungals can raise levels.
- Rifampicin can greatly reduce its effect.
- Other blood-pressure 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 It may be incomplete or out of date.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.