Harker Herbals Sleep Support (fomally known as 565 Calmunurse) is a gentle yet potent natural calminative that calms the body to support sleep, and relaxation. The herbs within the tonic are collectively nervous system strengthening, naturally calming, nervous function to help soothe and replenish nervous energy. Excellent for students, it supports restful, deep sleep without side-effects or day-time drowsiness. Very good to take if woken during the night or unable to sleep.