Treatment with Benicar was well tolerated, with an incidence of adverse reactions similar to placebo. Events generally were mild, transient and had no relationship to the dose of Benicar. The overall frequency of adverse reactions was not dose-related.
Sometimes you may also get an itchy rash on your skin, called hives. Antihistamines reduce or block histamines, so they stop allergy symptoms. Antihistamines work well to relieve symptoms of different types of allergies, including seasonal (hay fever), indoor, and food allergies, but they can't relieve every symptom. To treat nasal congestion, your doctor may recommend taking a decongestant.
Antihistamines work by blocking the effects of histamine, the chemical responsible for many of the allergy symptoms you experience.When histamine is released, it binds to special sites called receptors on cells in your nose and throat, causing them to swell and leak fluid.his results in inflammation, nasal congestion, runny nose, sneezing, itching, and other symptoms. Antihistamines block the effects of histamine by coating receptors, which prevents binding. This, in turn, prevents nasal allergy symptoms. Histamine works quickly once released.