What is the highest legal prescription dose of diphenahydramine? i have insomnia, and when i didn't have money for my prescription flurazepam 30 mg, i took benadryl. reading somewhere that 200 mg was the max prescription dose, i've been taking it for mont

There : There is no "legal" dose of any medication. Recommended maximum doses are listed in plain view on medicine containers. Exceeding those recommended doses significant increases the chances of experiencing an adverse side effects which could include death. You need to be discussing your medication use with you physician as exceeding recommended does or combining medications can have unintended consequences even in the healthiest individuals.

Tolerance: It is common that people become tolerant to the sedating effect of benedryl, so more won't make it better. Need to develop and maintain a regular sleep schedule, 4-500mg of magnesium is often helpful, , melatonin supplementation is generally benign and often helpful, Important to let you prescriber know what is going on!!!