"diphenhydramine didn&#039;t work for me so i tried doxylamine. first night took one 25mg pill and was out within the hour, got a full eight hours but woke up super groggy. the groggiest lasted most of the next day, definitely wasn&#039;t worth it. i tried it again two days later with only half a pill. had the same great sleep with only minimal grogginess. i&#039;ve continued to take 1/2 a 25mg pill 2-3 times a week when i know sleeping with be a struggle with great results. i&#039;d recommend anyone who experiences the sleep hangover to try a lower dose before writing it off."