antihistamine
A medicine that blocks histamine, a chemical that helps keep you awake. Some older ones make you drowsy and are sold as nighttime sleep aids.
Where it comes up
-
01
Why do my legs feel restless at night?
Restless legs at night: what the creeping urge to move is, why it comes in the evening, how iron and some medicines feed it and what helps.
-
02
Why is it so hard to sleep while pregnant?
Why sleep gets hard in each trimester, from nausea and heartburn to needing to pee, what the side-sleeping advice really says, and what helps.