A composition for oral administration comprising a cannabinoid in combination with a stilbenoid or derivative thereof and a solubility enhancing agent is described. Oral dosage forms, in the form of dissolvable tablet or capsule with enhanced bioavailability and processes for preparing them are also disclosed. The processes include lyophilisation of the cannabinoid powder or cannabinoid-stilbenoid co-crystals to form a powder which is pressed into tablets. The powder may be generated from the co-crystals of the cannabinoid with pterostilbene or the powder may be formed by subsequently mixing the lyophilized cannabinoid with the stilbenoid before forming the tablet.
