It's Friday, July 31st, 2015, and you're listening to Inquiring Minds. I'm Indravis Gontas.

And I'm Kishore Hari. Each week, we bring you a new, in-depth exploration of the space where science, politics, and society collide.

We endeavor to find out what's true, what's left to discover, and why it all matters.

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There are upwards of 2.5 million medical marijuana users in the United States alone.

These patients are using medical marijuana for a variety of ailments, pain management, seizures,

PTSD, even to treat cancer.

And that invites one really big question, are they using it in a scientifically sound manner?

We don't have an overwhelming history of peer-reviewed research on the topic, but David

Casaret set out to find answers

by talking with patients, doctors, researchers, and even experimenting on himself. He's written a new

book entitled Stoned a Doctor's Case for Medical Marijuana. Loyal listeners may remember David

...