The first drug derived from marijuana has been approved for sale in the US. Under the brand name Epidiolex, the purified cannabidiol (CBD) substance has shown promise as a treatment for two rare forms of epilepsy. CBD is the compound in marijuana that researchers have identified as what gives the “Devil’s lettuce” its medicinal properties. This shouldn’t be confused with THC which is what gives Cheech & Chong (Warning: language and, obviously, drug use) material for their comedic properties. CBD oil has been touted as a treatment for severe epilepsy in the past few years but having an FDA-approved drug with consistent quality and dosage could give physicians more confidence in prescribing it. The approval also influences enforcement, forcing the US Drug Enforcement Agency to reschedule the drug since it now has an accepted medical use.