Norvasc side effects may be include fatigue, headache, insomnia, abdominal pain, nausea, diarrhea, or constipation, or increased/difficult urination. Other more serious Norvasc side effects may also occur.

Side effects can be serious and if you experience any of the following, stop taking Norvasc and contact your doctor immediately or seek emergency medical treatment: an allergic reaction (difficulty breathing, closing of the throat, swelling of the lips, tongue, or face, or hives), unusually fast or slow heartbeat, chest pain, severe dizziness or fainting, psychosis, jaundice (yellowing of the skin or eyes), or swelling of the legs or ankles.

Other, less serious Norvasc side effects may be more likely to occur. Continue to take Norvasc and talk to your doctor if you experience fatigue or tiredness, headache, insomnia, vivid or abnormal dreams, flushing, abdominal pain, nausea, diarrhea, or constipation, or increased or difficult urination.

Norvasc relaxes (widens) the blood vessels (veins and arteries), making it easier for the heart to pump and reducing its workload. Norvasc is used to treat hypertension (high blood pressure) and to treat angina (chest pain). Norvasc is in a class of drugs called calcium channel blockers.

Norvasc side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

Remember that all medications/drugs can cause gastrointestinal symptoms and can be toxic to your liver.