In order for a prescription drug to reach the market, it must be extensively studied, first in animal and then in human clinical trials. Safety, efficacy, and risks must be determined. But as anyone who has seen a commercial for a prescription drug knows, there are still side effects. There are risks in stopping a prescription. And, of course, there are the risks of addiction.

Prescription opioid painkillers have increased drastically from common-use pill to massive public health crisis. At the same time, the perception of marijuana has shifted away from it as a gateway drug to using it as medicine.

Now, several recent studies show that public opinion is shifting to the point of substituting cannabis for opioids and other prescription drugs that have high…

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