❤️ Heart Health
Amlodipine Side Effects — What to Expect and When to Worry (2026)
Complete guide to amlodipine side effects — ankle swelling, headaches, flushing, and what to do about them. Updated January 2026.
Key Takeaways
- Ankle swelling (oedema) affects 8–10% of amlodipine users — most common significant side effect
- Amlodipine is the most widely prescribed calcium channel blocker in the UK
- Unlike ACE inhibitors, amlodipine does NOT cause dry cough
- Grapefruit juice increases amlodipine levels — avoid regular consumption
- Ankle swelling from amlodipine is not dangerous — but may require switching or dose reduction
What Is Amlodipine?
Amlodipine is a dihydropyridine calcium channel blocker — the most prescribed antihypertensive drug in the UK. It works by blocking calcium channels in vascular smooth muscle and cardiac tissue, causing vasodilation (widening of blood vessels) and reducing peripheral vascular resistance. It lowers blood pressure by approximately 10–15 mmHg systolic at standard doses.
8–10%
of users experience ankle swelling
10–15 mmHg
Average systolic BP reduction with 5–10mg amlodipine
48 hrs
Time to reach steady-state levels (very long half-life)
Side Effects Listed
| Side Effect | Frequency | Severity | Management |
|---|---|---|---|
| Ankle / foot swelling (oedema) | 8–10% | Moderate nuisance | Elevate legs; switch to felodipine; add diuretic |
| Headache | 7% | Mild, usually temporary | Usually resolves in first few weeks |
| Flushing / warmth | 5% | Mild | Usually temporary; worst with dose increases |
| Palpitations / fast heart rate | 2–4% | Moderate | Discuss with GP; may need dose reduction or switch |
| Dizziness | 3% | Mild | Rise slowly; take at bedtime if problematic |
| Nausea | 2% | Mild, temporary | Take with food |
| Gum enlargement (gingival hyperplasia) | Rare (<1%) | Can be significant | Excellent oral hygiene; switch to felodipine if severe |
Ankle Swelling — What's Happening and What to Do
Amlodipine causes preferential dilation of arterioles over venules — increasing hydrostatic pressure in capillaries and pushing fluid into interstitial tissue, particularly in the ankles and lower legs. This is peripheral oedema — not related to heart failure or kidney problems.
Management options:
- Dose reduction: Reducing from 10mg to 5mg often significantly reduces swelling
- Leg elevation: Keeping legs raised when sitting reduces fluid accumulation
- Switching to felodipine: Another calcium channel blocker with less peripheral oedema
- Adding an ACE inhibitor or ARB: ACE inhibitors/ARBs counteract the peripheral oedema from amlodipine — combination is both more effective for BP and reduces swelling
- Compression stockings: Helpful for comfort, do not address the underlying mechanism
ℹ️ Important: Ankle Swelling May Not Be from Amlodipine
Not all ankle swelling in patients taking amlodipine is from the drug. Heart failure, venous insufficiency, and lymphoedema cause ankle swelling and must be excluded. If ankle swelling is new, rapidly progressive, associated with breathlessness, or associated with a raised JVP — see your GP urgently to exclude heart failure.🔢 Free Tool
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Should I stop amlodipine if I have ankle swelling?▼
Do not stop amlodipine without speaking to your GP. Ankle swelling from amlodipine, while uncomfortable, is not dangerous. Your GP may try dose reduction, adding an ACE inhibitor (which counteracts the oedema), or switching to felodipine (less ankle swelling). Stopping blood pressure medication abruptly increases cardiovascular event risk.
Does amlodipine cause weight gain?▼
Amlodipine does not directly cause fat gain or increased appetite. The weight gain some people notice is water retention from ankle oedema — not actual fat accumulation. If you gain 2+ kg rapidly after starting amlodipine, this is likely fluid retention — report to your GP for review.
What is the difference between amlodipine 5mg and 10mg?▼
Amlodipine 5mg is the standard starting dose — it lowers systolic BP by approximately 8–12 mmHg. Amlodipine 10mg provides additional lowering of 3–5 mmHg but significantly increases the risk of ankle swelling and flushing. If ankle swelling is a problem at 10mg, stepping down to 5mg while adding a different antihypertensive class often provides better overall control with fewer side effects.
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⚕️ Medical Disclaimer: For informational purposes only. Always consult a qualified healthcare professional before starting or changing any medication or treatment.
Dr
Dr. Priya Sharma, MD
WellCalc Medical Contributor
All articles reviewed by qualified healthcare professionals following NHS, AHA, and WHO guidelines.