What are Benadryl side effects?
Side effects of Benadryl can include weight gain; abdominal pain; headaches; dry nose, throat or mouth; increased appetite; nausea; drowsiness or thickening of mucus. More serious side effects can include fatigue; palpitations; diarrhea; confusion; blurred vision; tinnitus; restlessness; hoarseness; early periods; constipation; cough; body aches or skin rash. You should contact your doctor if you experience any of these serious side effects. If you experience any of the signs of an allergic reaction, you should get emergency help immediately. These signs can include swelling of the face, mouth or tongue; trouble breathing; rash or hives.