Recently, the National Academies of Sciences, Engineering, and Medicine did a comprehensive review of the information available on the use of marijuana. The study looked at research published since 1999, and they came up with a number of conclusions. One of the most important findings is the current lack of good scientific information on marijuana. There is a clear need for good scientific research to guide healthcare professionals on the risks and benefits associated with marijuana use. Currently, to study marijuana or any of its derivatives, the federal bureaucratic hoops one must go through makes it extremely difficult to perform. The information available and the quality of the research at this point are limited. The conclusions are based mostly upon case report studies with limited controls.
The Complexity of THC and Marijuana
In Minnesota, medical marijuana is available to treat several specific conditions, and this year chronic pain was added to the list of approved conditions. The recent study also supports the idea that marijuana may be helpful to treat some people with chronic pain. For some it seems the non-THC (THC is the component that is responsible for the “high”) may help for pain. Since there are multiple causes of pain, it definitely is not indicated for everyone. Further, no studies have been done to determine what types of pain may be helped by components of marijuana, and it is not clear which of the 80 or more different compounds in marijuana are helpful. It is also known to be helpful for nausea from chemotherapy, and spasticity in multiple sclerosis. Marijuana may help in appetite with HIV, and there is limited evidence for help with bowel disorders, epilepsy, and Parkinson’s disease.
There are multiple potential harms that may be caused by marijuana. There is strong evidence that its use can lead to schizophrenia and psychosis, especially among young and frequent users. It may also lead to depressive disorders. The claim that it can make you a better driver is simply false, as statistics have shown that it leads to inattentive driving, a main contributor to traffic accidents. In pregnancy, use can lead to low birth weight in infants. Smoking pot can also cause and worsen any respiratory condition. There is weak evidence that smoking marijuana can increase the risk of heart attacks. One can also develop an addiction to marijuana. Conclusions cannot be drawn with regards to school achievement, unemployment, or social function and marijuana use.
Understanding It All
The overall scientific conclusion so far is that marijuana may have some reasonable medical uses. However, the scientific research on the compound is extremely limited at the moment. In the United States, it has been classified as a compound with no medical value and harmful to society. What needs to happen is that national legislation is needed to reclassify marijuana as a controlled substance, then good medical research can be done to determine what compounds in this plant are helpful or harmful. Once good research is done, then the use of compounds can occur with everyone understanding appropriate risks and benefits like with any other drug now available.
Thomas Cohn, MD
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