How long do the effects of Unisom last?

The effects of Unisom, a sleep aid containing the antihistamine doxylamine succinate, generally last for four to six hours. However, due to its half-life of around 10 hours, some individuals may experience drowsiness for a longer period, potentially up to eight hours or more. It's important to take Unisom only when one is able to get a full night's sleep and be aware of its potential impact on alertness the following day. The exact duration can vary based on factors such as metabolism, age, weight, and sensitivity to the medication. Individuals should follow dosing instructions carefully and consult a healthcare provider if they have any concerns about using Unisom or if they are taking other medications that can interact with it.