Most helpful positive review 72 of 75 people found the following review helpful 4.0 out of 5 stars Surprisingly decent sleep aid... Like many people posting reviews about Alteril, I have struggled with insomnia (among other sleep disorders) for many years. I've tried numerous sleep aids (Ambien, Doxylamine Succinate, Diphenhydramine, Melatonin) with varied effectiveness, side effects, advantages, and disadvantages.