Randomized Controlled Trial

Comparison of the subjective effects of Delta(9)-tetrahydrocannabinol and marijuana in humans.

Psychopharmacology (Berl.). 2002 Jun 1;161(4):331-9.
Randomized Controlled Trial

Dronabinol and marijuana in HIV-positive marijuana smokers. Caloric intake, mood, and sleep.

J. Acquir. Immune Defic. Syndr. 2007 Aug 15;45(5):545-54.
Randomized Controlled Trial

Opioid antagonism enhances marijuana's effects in heavy marijuana smokers.

Psychopharmacology (Berl.). 2010 Aug 1;211(2):141-8.