Here is a list of the uses of drugs:
1. Slowing the spread of plagues... Except for nano-virus with drug immunity, parasites with a lot of time on their hands, parasitic worms with transcendendence, the zombie virus, and a disease that increases the intelligence of apes but kills humans.
2. Making people hallucinate
3. Shattering the law to pieces
4. Making them very high
5. Making people get more drugs that do everything else
6. Slowing vital bodily functions
7. Nothing else