Research suggests drugs similar to THC, the active ingredient in marijuana, may help reduce memory impairment due to Alzheimer’s, from Physorg:
The research suggests that the development of a legal drug that contains certain properties similar to those in marijuana and hemp might help prevent or delay the onset of Alzheimer’s disease. Though the exact cause of Alzheimer’s remains unknown, chronic inflammation in the brain is believed to contribute to memory impairment.
Any new drug’s properties would resemble those of tetrahydrocannabinol, or THC, the main psychoactive substance in the cannabis plant, but would not share its high-producing effects. THC joins nicotine, alcohol and caffeine as agents that, in moderation, have shown some protection against inflammation in the brain that might translate to better memory late in life.
This following news THC could also be used as an antibiotic, and that cannabis is believed to be less dangerous than alcohol or tobacco.