Delta-9-THC, the main drug in cannabis plants that gets people high, can also be a potent medicine. It can treat extreme nausea and stimulate appetite, which is especially helpful for people who have HIV or are going through chemotherapy. A synthetic version of THC, called Dronabinol, has been used to treat these conditions since the 1980s, although some people prefer their THC to come from the plant itself.
But while marijuana is a relatively mild drug with few side effects — at least, compared to alcohol or tobacco — too much Delta-9-THC has its downsides. It can sometimes spark paranoia and anxiety or trigger dizziness and headaches. And it’s worth noting that much of the cannabis sold legally in the U.S. contains a high THC concentration.
That’s why many cannabis consumers are turning to an obscure analogue of Delta-9-THC called Delta-8-THC. The difference between Delta-8 and Delta-9 is subtle: Both will get you stoned, but the former is about half as potent as the latter. Many people claim that Delta-8 is a smoother, less anxious psychoactive experience than the more familiar Delta-9. It also seems to have additional medicinal effects than regular THC, such as better pain relief, but these claims have yet to be weighed out in clinical trials.