Benadryl is an antihistamine used to relieve symptoms of allergy, hayfever and the common cold. Symptoms include sneezing, runny nose, cough, itchy throat/nose/eyes, watery eyes and rash. It can also be used to treat and prevent vomiting and dizziness caused by motion sickness. It could also help you relax and fall asleep.
Side effects may include dizziness, upset stomach, constipation, blurred vision or dry mouth/nose/throat. Discontinued use if conditions persist and visit a healthcare professional.
To relieve dry mouth, such sugarless hard candy, chew sugarless gum or drink water.