3 doctors weighed in:

How quickly does Benadryl (diphenhydramine) start to work?

3 doctors weighed in
Dr. Giana Nicoara
Internal Medicine - Allergy & Immunology
1 doctor agrees

In brief: About 30 minutes

Lasts in the body for about 4-6 hours and then it needs to be redosed.

In brief: About 30 minutes

Lasts in the body for about 4-6 hours and then it needs to be redosed.
Dr. Giana Nicoara
Dr. Giana Nicoara
Thank
Dr. Jack Mutnick
Internal Medicine - Allergy & Immunology

In brief: Benadryl (diphenhydramine)

Onset of action is usually between 20-60 minutes.

In brief: Benadryl (diphenhydramine)

Onset of action is usually between 20-60 minutes.
Dr. Jack Mutnick
Dr. Jack Mutnick
Thank
Read more answers from doctors