Donât get blown away by that big, intimidating word! We havenât introduced word roots yet. I just wanted to demonstrate the major parts of a medical term. Letâs see how prefix and suffix changes can alter the meaning of a term without changing its central meaning by keeping the root the same.
Making the world better, one answer at a time. Benadryl, or diphenhydramine hydrochloride, when taken by mouth, works within 15 to 60 minutes. When injected through a muscle, it takes 20 to 30 minutes to work.When injected through a vein, it works rapidly. The effects of diphenhydramine hydrochloride work for approximately 4 to 8 hours, regardless of the form in which it is taken.aking the world better, one answer at a time. Benadryl, or diphenhydramine hydrochloride, when taken by mouth, works within 15 to 60 minutes. When injected through a muscle, it takes 20 to 30 minutes to work. When injected through a vein, it works rapidly.
1 How long does Benadryl allergy med stay in your system? 7-18 hr, effectively: That's with a normal dose. The half-life (time it takes 1/2 the med to leave your body) is 3.4 to 9.2 hrs. Double that time and 75% of it has left your system at which point it's generally not helping anymore.