Cannabinol (CBN) is a minor cannabinoid that forms in cannabis when THC ages. People often take it in the evening because it can bring on drowsiness and help with sleep.
Common forms include oils, tinctures, gummies, and capsules. Some products blend CBN with other cannabinoids like CBD or THC.
CBN can cause sleepiness and may interact with medications that affect the central nervous system. Laws around CBN differ from place to place, so confirm your local rules. Anyone pregnant or breastfeeding should steer clear.