THC hemisuccinate (Δ⁹-THC-O-hemisuccinate, Dronabinol hemisuccinate) is a synthetic derivative of tetrahydrocannabinol, developed in the 1990s. It is a water-soluble prodrug ester which is converted into THC inside the body, and was developed to overcome the poor bioavailability of THC when taken by non-inhaled routes of administration. In medical applications it has mainly been formulated as rectal suppositories.