Next, he addresses the medical uses of marijuana for pain, AIDS wasting, cancer chemotherapy, multiple sclerosis, glaucoma, epilepsy, asthma, mood disorders, and sleep. He gives his conclusions while acknowledging that the subject has not been studied in a scientifically rigorous way. Then he takes up the question of safety. Is marijuana toxic? What about long-term exposure compared with the acute effects? Is it teratogenic? Is there a fetal marijuana syndrome analogous to fetal alcohol syndrome? Professor Iversen weighs in on these and other questions, including the special problem of the fact that smoking marijuana is still the most effective route of administration.