Answer
Oct 08, 2026 - 10:16 AM
The active ingredient in Silenor is doxepin hydrochloride. Doxepin hydrochloride is a medication from the tricyclic antidepressant (TCA) class, which is thought to help with sleep by blocking certain histamine receptors in the brain. Blocking these receptors can reduce wakefulness, helping people stay asleep longer.
