I've been using diphenhydramine as a sleep aid, but the dosage seems to be losing it's effect. Can I increase it by cutting a pill in half?
Adult dose of diphenhydramine is 25-50mg (so 1-2 25mg tabs) every 4-6 hours. You should take no more than 6 doses per 24 hours. So yes, you can take 11/2 tabs or you can increase to two tabs if you want. The drowsiness side effect of an antihistamine like Benedryl does decrease as you become tolerant to the effects. It is good to take a break from taking it from time to time so that you dont develop tolerance.
- Diphenhydramine Information for Consumers
- Diphenhydramine Information for Healthcare Professionals (includes dosage details)
- Side Effects of Diphenhydramine (detailed)
Search for questions
Still looking for answers? Try searching for what you seek or ask your own question.
Posted 10 Mar 2012 • 2 answers
Posted 5 Apr 2014 • 2 answers
Posted 30 Jan 2017 • 1 answer
Posted 13 Nov 2017 • 1 answer
Posted 27 Mar 2018 • 2 answers