It has been proven that medical marijuana can be safe and effective for treating cancer, AIDS, multiple sclerosis, pain, epilepsy, glaucoma, and other conditions as well. Marijuana is actually less toxic then many of the medicines and drugs that doctors prescribe today to relieve the same symptoms. The tetrahydrocannabinol (THC) contained in this plant, along with many other cannabinoids, cause relief unlike any other drug.
Although marijuana has been proven as a alternative to treating cancer, it is still a dangerous drug. There are other medical options that have the same effect on cancer patients without being as dangerous. Different medicines can diminish pain and cause relief without having as dangerous side effects.
Although marijuana poses some danger, so do most other drugs prescribed by doctors. It is a powerful drug, but the dangers associated with it are the same associated with smoking cigarettes. Also, many patients only would need medicinal marijuana for a short amount of time, and therefore would not receive many negative smoking effects. The harms of this drug are within the range tolerated for other medications. Cannabis is one of humanity's oldest medicines;China used it in medicinal tea, and for thousands of years people have used this drug without knowing any negative effects. With this being said, the positive effects of marijuana outweigh the slight risks.
Treating diseases with smoked marijuana isn't a valid option. It has negative effects on the heart, lungs, brain, and immune system no matter how long they've been treated with it. Cannabis weakens the immune system which is very valuable to someone who is undergoing a deadly disease. These patients will become dependent on the drug and even when they are not sickly anymore they will feel the need to use it.
It is proven that marijuana is not an addictive drug if used for only a short amount of time. If it is used over a span of many years, it is possible to become dependent on it. However, this number is still only 9%. Also, as I mentioned before, if a patient is prescribed this drug in order to overcome an illness, they will most likely only be using it for a short period of time. If this is the case, it is nearly impossible for them to become "addicted".
The FDA recently reported that there were not scientific studies that support The use of medical marijuana. If a physician prescribes it in an area where it isn't even legal, they could lose their licenses. There wouldn't be a problem with the FDA is there wasn't an issue with using medical marijuana as a treatment.