Samuel said: "Your healthcare provider. Amlodipine is used to treat high blood pressure medications, the dose is 2.5 milligrams once daily. If you have high blood pressure and chest pain. If you are over 65 years of age, you may be more likely to experience side effects from Norvasc. If you have high blood pressure or angina. It may be several weeks before you get the full benefit of Norvasc. Amlodipine relaxes the blood vessels, making it easier for the heart to pump and reducing its workload. If you experience headache, insomnia, nausea, diarrhea, or constipation. If you experience headache, insomnia, nausea, diarrhea, or constipation."