Amlodipine, also sold as Norvasc, is a prescription medication used to treat high blood pressure and angina, a type of chest pain caused by narrowed blood vessels. This medication belongs to a group of medications known as calcium-channel blockers. Calcium channels are microscopic receptors that are located on the heart and blood vessels. Blocking these receptors with amlodipine results in a relaxation of the blood vessels and a decrease in heart rate, according to Drugs.com, which accounts for its therapeutic effects. A patient taking amlodipine should be aware of its possible side effects.
Irregular Heartbeat
An irregular heartbeat is a side effect of amlodipine, according to the Mayo Clinic. Although this medication is designed to improve cardiovascular function, it may cause an irregular, pounding heartbeat in some patients. This side effect is rare and requires prompt medical treatment. These symptoms may be a side effect of amlodipine or it may be a sign of a worsening cardiovascular condition.
Faintness
Drugs.com states that amlodipine may also cause faintness, or light-headedness. This occurs because amlodipine may cause a dangerous drop in blood pressure that results in a decreased blood flow to the brain. In this case, the patient should lie down with his feet elevated to prevent a complete loss of consciousness and seek the proper medical treatment. His doctor may reduce his dosage or prescribe a different medication that does not result in this dangerous side effect.
Upset Stomach
Amlodipine may also cause an upset stomach, according to Drugs.com. This occurs because amlodipine affects calcium channels that are present in the stomach and intestines. This can result in diarrhea, constipation, nausea, vomiting and stomach pain, states Drugs.com. These effects are not normal and a patient on this medication should let his doctor know that he is experiencing these side effects.
Jaundice
According to Drugs.com, amlodipine may cause jaundice, which is the yellowing of the eyes or skin. This occurs because amlodipine is metabolized, or broken down, in the liver. In certain people, especially those with liver conditions, amlodipine may cause damage to the liver, which can result in jaundice. In this case, a patient should immediately stop taking amlodipine and seek medical treatment.
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