What Are The Side Effects Of Antihistamines?

Stomach Pain

Stomach pain is a rare potential side effect of antihistamine use. For some individuals, the pain may be severe. Stomach pain might be related to the urinary retention that can sometimes occur with these medications. In addition, this medicine may lead to constipation, and that could produce stomach pain. Rarely, some patients could experience swelling of the abdomen along with the pain. Patients might want to keep a log of all episodes of stomach pain they experience while on antihistamines. It can be helpful to note any potential food triggers or other issues the patient believes could be contributing to the pain. If stomach pain is severe or continues for more than a few days, patients should see their doctor as soon as possible. It is also important to contact a physician if abdominal pain occurs with burning or pain while urinating. Emergency medical attention is necessary if the abdomen is swollen or if the patient experiences abdominal pain with shortness of breath.