Amlodipine: what it treats, how to take it, side effects
Last updated September 3, 2026.
Amlodipine is a calcium channel blocker that relaxes blood vessels so the heart pumps easier. You may know it as Norvasc. It treats high blood pressure and certain types of angina (chest pain) and coronary artery disease.
What does it treat?
High blood pressure, and certain types of chest pain and coronary artery disease. MedlinePlus draws one distinction clearly: taken regularly, amlodipine controls chest pain, but it does not stop chest pain once it starts - your doctor prescribes a different medication for attacks in progress. It controls these conditions; it does not cure them.
How do you take it?
Once a day, with or without food, at the same time every day. The label's usual starting dose is 5 mg once daily, maximum 10 mg, with small, fragile, or elderly patients often starting at 2.5 mg; your doctor starts low and adjusts. Liquid forms need a dosing cup or oral syringe, never a kitchen spoon. Keep taking it even when you feel well. Missed dose: take it when you remember - but MedlinePlus adds a specific twist: if it is less than 12 hours until your next dose, skip the missed one entirely. Never double up.
Side effects to know
- Common: swelling of the hands, feet, ankles, or lower legs (the signature amlodipine effect), plus nausea, stomach pain, dizziness or lightheadedness, drowsiness, excessive tiredness, flushing, and muscle stiffness or tremors.
- Serious: more frequent or more severe chest pain, a rapid, pounding, or irregular heartbeat, and fainting mean calling your doctor immediately or getting emergency treatment.
Who should not take it?
Anyone who has had an allergic reaction to amlodipine. Tell your doctor if you have or have ever had heart failure or heart or liver disease - the label starts people with liver impairment at the lower 2.5 mg dose. If you are pregnant, planning pregnancy, or breastfeeding, tell your doctor, and call if you become pregnant while taking it.
When is it an emergency?
Chest pain that is more frequent or more severe than usual is an emergency signal on this drug, not a dose problem - get emergency care. Fainting and a pounding or irregular heartbeat mean calling your doctor immediately. For an overdose, call Poison Control at 1-800-222-1222. Pymander's escalation routing is built and tested specifically for this class of decision; see the safety architecture working paper.
What a Pymander AI doctor consult looks like
Illustrative example, not a real member's messages.
Common questions
Why are my ankles swelling on amlodipine?
It is the drug's best-known side effect - MedlinePlus lists swelling of the hands, feet, ankles, or lower legs first on its common list. Relaxed blood vessels let fluid settle at the lowest points. It is usually harmless, but mention it to your doctor; dose adjustments or combinations sometimes reduce it.
How long does amlodipine take to lower blood pressure?
It builds over days to weeks. The label notes your doctor will start you on a low dose and increase gradually, and MedlinePlus says to keep taking it even if you feel well - blood pressure control is quiet. Judge it by your readings over weeks, not by how you feel day one.
Can amlodipine stop chest pain once it starts?
No, and the distinction matters. MedlinePlus says taken regularly, amlodipine controls chest pain, but it does not stop chest pain once it starts - your doctor prescribes a separate medication for attacks in progress. And chest pain that becomes more frequent or severe on amlodipine is an emergency call, not a wait-and-see.
What happens if I miss a dose of amlodipine?
MedlinePlus gives a specific rule: take it when you remember, but if it is less than 12 hours until your next scheduled dose, skip the missed one. Never take a double dose. One missed day rarely matters; repeated misses show up in your blood pressure readings.
Can I drink alcohol while taking amlodipine?
Neither the FDA label nor MedlinePlus lists a specific alcohol interaction for amlodipine. Alcohol can lower blood pressure and add to this drug's dizziness and lightheadedness, so go carefully until you know how the two combine in you - and ask your doctor.
Do I have to take amlodipine forever?
As long as your doctor says it is doing its job. MedlinePlus is plain: amlodipine controls high blood pressure and chest pain but does not cure them, and you should not stop without talking to your doctor. Lifestyle changes - less salt, healthy weight, exercise, no smoking - work alongside it and sometimes shift the long-term plan.