Gabriel Nahas, MD, PhD, Professor Emeritus at Columbia University, wrote in an editorial published Mar. 1997 in the Wall Street Journal:

“This smoke [marijuana] contains carbon monoxide, acetaldehyde, napthalene and carcinogens. Inhalation of THC decreases lung defense mechanisms which are already compromised in AIDS patients, who are extremely vulnerable to pulmonary infections and tumors like Kaposi’s Sarcoma.

Thus marihuana smoke is a questionable choice to treat the symptoms of AIDS or cancer, especially when safer and more effective medications are available.”

Mar. 1997