Question: how long do you have to wait to take benadryl?
Answer: Benadryl Dosage If you are using Benadryl liquid, do not use a kitchen teaspoon to measure a dose. Use the measuring cup that comes with the medication. Typical doses for Benadryl are: For adults and children older than 12, take 1 to 2 tablets or capsules every 4 to 6 hours as needed.