Benicar is the brand name of olmesartan, a medication that improves blood flow by preventing the blood vessels from narrowing. Drugs.com reports that it is used to lower blood pressure in individuals diagnosed with hypertension and it may be used for other purposes. As with any medication, Benicar has the potential for side effects.
Less Serious Side Effects
Drugs.com reports several side effects that are not considered serious unless they are persistent or bothersome. These include runny or stuffy nose, sore throat, cough, joint pain, back pain, stomach pain, diarrhea, headache, dizziness, mild itching, skin rash, weakness or an increase in sweating.
Serious Side Effects
Serious side effects should be reported to a medical professional, states Drugs.com. These include feeling as if you may pass out, trouble urinating, painful urination, urinating less than usual or not at all, chest pain, rapid heart rate, swelling in your hands, swelling in the feet, slowed heart rate, weakened pulse and/or feeling tingly. Benicar can lead to a condition that breaks the skeletal muscle tissue down, which leads to kidney failure. eMedTV.com reports that serious side effects occur in fewer than 1 percent of patients who use Benicar.
Allergic Reaction
Some individuals may experience an allergic reaction to Benicar. Drugs.com reports that these symptoms are serious. Examples include hives, trouble breathing, swelling of the face, swelling of the lips, swelling of the tongue and/or swelling of the throat.
Rare Complications
eMedTV.com reports that in fewer than 1 percent of cases, Benicar can lead to serious complications. These may include vertigo, heartburn, high cholesterol, hair loss and/or the serious breakdown of muscle.



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