Norvasc, also known as amlodipine, is an anti-hypertensive medication that belongs to the drug group referred to as calcium channel blockers. This oral prescription medication is used to treat various cardiovascular conditions; that is, high blood pressure and angina pectoris or chest pain. As with any medication, adverse reactions are possible.
Function
Norvasc functions by relaxing the vessels and arteries, specifically, the pressure of blood pushing against blood vessel walls. Under these conditions, pressure decreases and the flow of oxygenated blood to the heart is improved. As a result of the arteries relaxing, mild effects that are dose-related may be anticipated.
Edema
The most common side effect of this drug is edema or the retention of fluid. Specifically, during clinical trials, RxList.com states that up to 14.6 percent of participants developed peripheral edema or the retention of fluid in the lower extremities. Signs of this side effect include legs, ankles or feet looking puffy or shoes feeling tight. If you notice that the swelling becomes severe, contact your physician immediately. A diuretic may need to be prescribed that will help you get rid of excess fluid.
Headaches
Another common side effect of this medication is that it may cause headaches when a person first starts taking it, according to Drugs.com. Because this drug reduces blood pressure and the rate at which the heart beats, this results in a change in flow of blood throughout the body that includes the head. Drugs.com reports that up to 7.3 percent of clinical trial participants on Norvasc experienced this adverse reaction. Another common effect that may be present is dizziness. These adverse effects are considered common mild side effects of this drug and usually resolve on their own as the body adjusts to the medication. However, if the headaches and dizziness persist, the prescribing physician should be contacted.
Fatigue
According to Norvas.com, one may complain of fatigue or excessive tiredness when beginning Norvasc. This reaction RxList.com reports occurred in up to 4.5 percent of clinical trial participants. Associated with this effect may be the feeling of lethargy, drowsiness or somnolence. Again, such adverse effects are considered to be common mild side effects of this drug that usually resolve on their own as the body adjusts to the medication. Lying down periodically may help to alleviate these symptoms.
Palpitations
As one begins this drug regimen, a fast heart rate or palpitations may be experienced. The heart's response to lowered blood pressure is to increase its pumping in order to raise the pressure of the blood flow in the vessels. Facial flushing also may occur, notes Drugs.com, as it did in up to 4.5 of the trial participants. Pay attention to the extent of these side effects, and if necessary, notify the prescribing physician of your concern if they persist.
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