Vomiting is the body's natural way of purging toxic substances. If the vomit message is suppressed by THC, dangerous amounts of alcohol can be ingested and absorbed. Thus alcohol poisoning could become a real threat in rare cases. Smoking marijuana can deliver 3 times more tar than smoking tobacco. Marijuana's irritating smoke dilates blood vessels, reddens the eyes, and inflames nasal tissues.
Regular use can lead to bronchitis.
Studies also indicate that marijuana may impair the capacity of the white cells to fight invading infection. Additionally marijuana disturbs the pituitary gland. Some studies show reduced sperm production in men and inhibited ovulation in women. Opioid Receptor Sites Researchers are learning more about the way in which Narcotic Analgesics effect the body. In 1994 scientists identified opioid receptor sites.