Norvasc or amlodipine besylate, is a long-acting anti-hypertensive medication that belongs to the drug group known as calcium channel blockers, and the typically prescribed dosages range between 5 and 10 mg daily. This oral medication is used to treat various cardiovascular symptoms and conditions--for example, high blood pressure and angina pectoris. Norvasc relaxes the vessels and arteries, which decreases the blood pushing against vessel walls. When this occurs, one's blood pressure goes down; also, the flow of oxygenated blood throughout increases. This drug, similar to all medications, may cause some common side effects.
Peripheral Edema
The most common side effect of this drug is edema, or the retention of fluid. Specifically, during clinical trials, Norvasc.com states that up to 8.3 percent of participants developed peripheral edema, or the retention of fluid in the lower extremities. Signs of this side effect include swelling of the lower legs, ankles or feet with the appearance of puffiness. Should this adverse effect occur, notify a physician immediately for edema in patients with cardiovascular conditions can become serious. The physician may need to prescribe a diuretic to help rid the excess fluid from the body.
Headaches and Palpitations
This medication may also cause headaches, according to Norvasc.com and Drugs.com. This drug reduces blood pressure and the rate that the heart beats per minute, which causes a change in the flow of blood to all parts of the body, including the head. Drugs.com reports that up to 7.3 percent of clinical trial participants on Norvasc experienced this symptom. Another frequently reported effect, according to eMedtv.com, is heart palpitations, which occurred in up to 4.5 percent of clinical trial participants. If headaches occur, speak with a pharmacist about recommending an over-the-counter medicine. Contact a physician if these side effects increase in frequency or severity.
Tiredness with Lethargy
According to Norvasc.com, one may complain about feeling fatigued or excessively tired when beginning Norvasc. This reaction, eMedtv.com reports, occurred in up to 4.5 percent of clinical trial participants. Also, some may experience feelings of lethargy or drowsiness. These effects are considered temporary and usually resolve on their own as the body adjusts to the medication. Lying down periodically may help alleviate them.
Dizziness and Hypotension
Another common effect that may occur is dizziness as a result of the lowered blood pressure. Norvasc.com reports that dizziness occurred in 3.2 percent of clinical trial participants. Again, this effect is considered to be a temporary one that will likely subside as the body adjusts to receiving this medication. However, if dizziness or light-headedness persist and become worrisome, contact a prescribing physician.
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