Some patients are lucky to live in states with legal medical cannabis, some reside in more conservative states.
The National Cancer Institute is the flagman institution in cancer research established by the government and the most reliable official source of information about cancer. Silently but obviously, NCI has recently recognized that marijuana (or cannabis) can fight cancer cells.
The NCI’s website contains general information that provides the definition of cannabinoids (marijuana constituents) and how they work in our body. While the federal law prohibits cannabis, there we may find unexpected but useful information. The answer to the question 6 tells us that marijuana is reported to eliminate cancer cells in the laboratory.
The site says that preclinical studies that have been conducted on mice models had the following results: cannabis has anti-cancer properties that inhibit malignant tumor growth, prevents malignant cells from spreading, stops cancer cell growth and eventually make cancer cells die. Apparently, cannabinoids also have anti-inflammatory properties, thus they can minimize the risk of colon cancer. Also, malignant cells found in liver may be killed by THC (tetrahydrocannabinol), the main constituent of marijuana. According to the website, THC has been shown to reduce tumors and the administration of CBD (cannabidiol) has led to the death of cancer cells while having no effect on healthy cells in patients with breast cancer. It is also thought that CBD may increase the chemotherapy effectiveness and cancer cell death without harming normal cells.
Moreover, NCI recognizes the medical benefits of cannabis ,  as it can help to mitigate nausea, lack of appetite, pain, anxiety, control vomiting and nausea, stimulate appetite and treat sleep disorders.
Despite the fact that cannabis-infused products, hemp oil and merely smoking marijuana may have wonderful effects on patients with a variety of medical conditions, the U.S. government does not allow using cannabis to treat cancer or alleviate the harmful side effects of such treatment. Luckily, the number of advocates of medical marijuana is growing and soon it will be possible to expand the map of legalized weed states.