November 2015 Monitor on Psychology

Chronic psychoses often develop after acute substance-induced psychosis

Many teenagers experiment with marijuana

When cannabis is first smoked one of its most prominent immediate effects istachycardia which tends to be proportional to the ingested dose (Stimmel, 1979). The rateincrease varies from 50-100% of resting pulse with an accompanying decrease in orthostaticblood pressure. It was observed by Aronow and Cassidy that the consumption of onemarijuana cigarette containing 19 mg of THC decreased exercise time until angina by 48% ascompared to a marijuana placebo which only reduced time to angina by 9%. The authors ofthis study concluded that cannabis smoking increased myocardial oxygen demand whiledecreasing myocardial oxygen delivery (Aronow and Cassidy, 1974). Hollister (1988)concludes from these results that, although smoking is not recommended for anyone withangina, the shorter time until angina seen with cannabis combined with its induction oftachycardia makes it particularly deleterious for those suffering from arteriosclerosis ofthe coronary arteries or congestive heart failure. Nahas (1984) summarises what hebelieves to be the cardiovascular threat of cannabis ingestion based on the abovefindings:

Weller, R. A. (1985). Marijuana: Effects and motivation. Medical Aspects of HumanSexuality, 19(3), 92-104.

Marijuana May Help Mental Health Disorders | Time

Zuckerman, B., Frank, D. A., Hingston, R., et al. (1989). Effects of maternal marijuanaand cocaine use on fetal growth. New England Journal of Medicine, 320, 762-768.

The Institute of Medicine published a journal on the use of marijuana and the effects it as a recreational drug and medicinal drug.

A wide range of intellectual performance impairment due to marijuana intoxication isknown. Cognitive tasks, such as digit symbol substitution, complex reaction time, recentmemory and serial subtractions, are all performed with an increased error rate as comparedto the sober state. These abilities are all generally recognised to be necessary toperform skilled tasks. Marijuana interferes with the transfer of information fromimmediate to short-term storage. Less demanding tasks such as simple reaction time areperformed as well during the non-drug condition. A major unresolved question is whetherlong-term use produces irreversible effects (p. 157).


Media Spotlight | Psychology Today

The short-term usage of the drug is helping many cope with their illness, it is because of these effects doctors, patients, and medicinal marijuana supporters rally for legal use of the drug in America.

Psychiatry, Psychology, Counseling, and Therapy: What …

Those advocating the use of medicinal marijuana argue that because it will be controlled by the doctor administering the drug, there isn't a chance of psychological addiction or any other problems believed to be connected with marijuana use.

Marijuana Addiction Is Rare, but Very Real - Healthline

Grant, I., Rochford, J., Fleming, T., & Stunkard, A. (1973). A neuropsychologicalassessment of the effects of moderate marijuana use. J Nerv Ment Dis, 156(4), 278-280.

Most people can use marijuana without becoming addicted

Because the substance, when used medicinally, is monitored/controlled, the psychological effects on the patient is slightly different, and its effects also vary depending on the type of the disease the patient is suffering from.

The Unconscious in Clinical Psychology

Tashkin, D. P., Shapiro, B. J., Lee, Y. E., & Harper, C. E. (1976). Subacuteeffects of heavy marijuana smoking on pulmonary function in healthy men. New EnglandJournal of Medicine, 294(3), 125-129.