Norvasc (Amlodipine): Blood Pressure, Angina and Safety

What Norvasc does

Norvasc contains amlodipine, a calcium-channel blocker that relaxes blood vessels. It treats high blood pressure and can prevent attacks of stable or vasospastic angina. This summary concerns the 5 mg oral tablet. It is preventive treatment, not a substitute for emergency assessment of new chest pain. Reducing blood pressure can lower future cardiovascular risk even when hypertension causes no noticeable symptoms.

Using the prescribed product

Amlodipine is often needed for a long time. The prescribed strength depends on the reason for treatment, blood pressure response and individual health. Follow the directions for your own tablets, rather than assuming another person with the same symptoms needs the same treatment. Check with a pharmacist if the packet, appearance or instructions change. Avoid driving or operating machinery if dizziness affects concentration or balance.

Side effects and when to get help

Swollen ankles or feet are a prominent adverse effect; headache, flushing, tiredness, nausea and dizziness may also occur. Persistent or troublesome symptoms deserve review rather than an unsupervised change. Severe faintness can indicate excessive blood-pressure lowering. New or worsening chest pain needs urgent assessment, particularly after treatment is started or adjusted in someone with severe coronary disease. Breathing difficulty or swelling of the tongue or throat may indicate an emergency allergic reaction.

Interaction and medical-history checks

Moderate or strong CYP3A inhibitors can raise amlodipine exposure, so swelling and low blood pressure may need closer monitoring. Sildenafil can add to blood-pressure lowering. The US label limits the dose of simvastatin used with amlodipine, and transplant medicines such as tacrolimus or ciclosporin may require blood-level monitoring. These cautions are not a reason to assume every combination is prohibited. Significant liver impairment and severe aortic-valve narrowing also need prescriber attention.

Pregnancy, breastfeeding and regional guidance

Pregnancy or plans for pregnancy should be discussed with the treating clinician; other blood-pressure medicines may be preferred depending on the situation. Amlodipine reaches human milk in small amounts, but limited observations do not establish safety for every infant. Breastfeeding decisions need an individual assessment. The cited US manufacturer label and NHS guidance support this English summary; the locally supplied product leaflet remains important.

Sources

• Norvasc oral tablets: US product information — US prescribing information, revised January 2019; current manufacturer page checked 30 October 2026
• NHS guidance on amlodipine — Patient medicine guidance; checked 30 October 2026

Source check: 30 October 2026. This records a source check, not a clinical review by a doctor or pharmacist. Use the current leaflet supplied with your medicine and seek qualified advice for personal treatment.