1. Expository Essay - The Antihistamine Benadryl
Because Diphenhydramine is taken orally, the rate at which the drug action begins is considered to be slow (30-45 minutes) with the effects of Benadryl usually last anywhere from 4-6 hours. Benadryl is metabolized by the liver resulting in Nordiphenhydramine (active metabolite), Dinordiphenhydramine, and Diphenylmethoxyacetic acid which are almost completely excreted (via urine) in 24 hours. With a rapid onset, the peak of Diphenhydramine occurs approximately 2-3 hours after administration. Diphenhydramine's half-life of 1-4 hours gives it a duration that ranges from 4-6 hours. ...
- Word Count: 733
- Approx Pages: 3
- Has Bibliography
- Grade Level: Graduate