The rapidly-dissolving tablet or strip ought to be allowed to dissolve on the tongue and then swallowed, with or without water.
The dose is based on your age, medical condition, and response to therapy. Read the dosing instructions carefully for each product since the quantity of diphenhydramine may differ between products. Don’t increase your dose or take this medicine more often than directed.
To help you sleep, take your dose about 30 minutes before bedtime. If you continue to have difficulty sleeping for longer than two weeks, contact your health care provider.
Tell your doctor if your condition doesn’t improve or if it worsens.