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April 20 is a popular day known colloquially as 4/20 — an unofficial day to celebrate marijuana. What’s the tie-in between 4/20 and pot? Some say it has to do with the Grateful Dead. Others give credit to a group of teens in 1970s who were searching for a fabled pot farm. Either way, marijuana is gaining traction as a therapeutic — 29 states and the District of Columbia have legalized its medicinal use.

How much do you know about marijuana and its medicinal properties? Take our quiz. We hope you get a high score.


Which of these is not an effect of marijuana?*

In studies on rats, THC attaches to receptors found in which part of the brain?*

Marijuana has been touted as effective therapy for many conditions. But there’s no strong evidence that it can help which of the following?*

Whoopi Goldberg has her own line of medical cannabis products. Which of these isn’t one of the products she sells?*

There’s strong evidence that smoking pot regularly can lead to which ill effect?*

The pharmaceutical company Insys won regulatory approval to market synthetic marijuana as a treatment for which condition?*

All marijuana used for federally funded research currently comes from one site. In which state is it located?*

After states legalize marijuana, their opioid deaths fall.*

This compound found in marijuana has been found to have some anti-tumor properties in cell culture experiments, and it doesn’t have psychoactive effects.*

The human body produces natural molecules that affect the same cannabinoid receptors as the psychoactive chemicals in pot.*
  • I currently take a mild opioid for chronic pain. I would like to switch to marijuana (legal in my state), but must first get a doctor’s certification to do so. I receive Medicaid which doesn’t cover this doctor visit. I cannot afford to pay myself ($200), nor can I afford the cost of the marijuana which is also not covered by insurance though my opioid is covered. The government is, by default, forcing me to continue on opioids. What’s wrong with this picture?

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