Karen Cameron, RNC, MSN, Correspondent for WebMD, stated in a June 14, 2004 article titled "Are Depression and Marijuana Linked?" and posted on the website WebMD:

“It is pretty well known that the psychoactive chemicals in marijuana interfere with the balancing process that antidepressants work toward.

As you may already know, depression is a biochemical illness — an imbalance in chemicals in the brain. Those antidepressants help things become better balanced, but they can’t do the job nearly as well if one is smoking marijuana.

Marijuana contributes to depression and destroys natural sleep. There really is no good reason to continue smoking it.”

June 14, 2004