Tetrahydrocannabinol in Heterogeneous Glaucomas," Annals of Ophthalmology, 12, No 8. (1980). As a result of a growing acceptance of cannabis as a medicinal substance and a similar rejection of Treasured cbd the old scare-stories from years ago, 12 states have, by statute or state constitutional amendment allowed the regulated use of cannabis for medical purposes. However, they also have put into place strict regulatory programs to manage patients.