A comprehensive study published in the Journal of the American Medical Association found that the medical claims for medical marijuana are mostly based on weak evidence, anecdote, and wishful thinking.
“There is some evidence to support the use of marijuana for nausea and vomiting related to chemotherapy, specific pain syndromes, and spasticity from multiple sclerosis,” the accompanying editorial said. For other conditions – including PTSD – the evidence is poor.
For a host of legal and other reasons, marijuana hasn’t been rigorously tested on a large scale. But, the people who promote and sell marijuana make a great many unsubstantiated claims about its efficacy about its “medicinal qualities.”
To date, medical marijuana has been legalized in 23 states, as well as in Canada.
Approved drugs are standardized, with specific doses and a limited number of uniform ingredients that are subject to strict quality control. The same cannot be said of marijuana, even medical marijuana.