It's made by pharmaceutical company LNK International, Inc. Kirkland Signature Sleep Aid's active ingredient, doxylamine succinate, is a well-known antihistamine that's also found in Unisom Sleeptabs.

Unisom SleepTabs: $12 at Amazon Doxylamine ... but that isn't the only way to get your nighttime dose. There are three types of sleep aids you can use. These are temporary solutions for the ...

For Unisom, Sunday was planned as the exclamation point of a partnership with Barkley himself, which consisted of an Instagram post and three Instagram stories that began last Wednesday night.