More than half of U.S. states and the District of Columbia have legalized medical marijuana in some form, and more are considering bills to do the same. Yet while many people are using marijuana, the FDA has only approved it for t
What is medical marijuana?
Medical marijuana uses the marijuana plant or chemicals in it to treat diseases or conditions. It’s basically the same product as recreational marijuana, but it’s taken for medical purposes.
The marijuana plant contains more than 100 different chemicals called cannabinoids. Each one has a different effect on the body. Delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) are the main chemicals used in medicine. THC also produces the “high” people feel when they smoke marijuana or eat foods containing i
What is medical marijuana used for?
Medical marijuana is used to treat a number of different conditions, including:
- Alzheimer’s disease
- Appetite loss
- Crohn’s disease
- Eating disorders such as anorexia
- Mental health conditions like schizophrenia and posttraumatic stress disorder (PTSD)
- Multiple sclerosis
- Muscle spasms
- Wasting syndrome (cachexia)But it’s not yet proven to help many of these conditions, with a few exceptions, Bonn-Miller says.
“The greatest amount of evidence for the therapeutic effects of cannabis relate to its ability to reduce chronic pain, nausea and vomiting due to chemotherapy, and spasticity [tight or stiff muscles] from MS,” Bonn-Miller says
How does it help?
Cannabinoids — the active chemicals in medical marijuana — are similar to chemicals the body makes that are involved in appetite, memory, movement, and pain.
Research suggests cannabinoids might:
- Reduce anxiety
- Reduce inflammation and relieve pain
- Control nausea and vomiting caused by cancer chemotherapy
- Kill cancer cells and slow tumor growth
- Relax tight muscles in people with MS
- Stimulate appetite and improve weight gain in people with cancer and AIDS
How do you take it?
To take medical marijuana, you can:
- Smoke it
- Inhale it through a device called a vaporizer that turns it into a mist
- Eat it — for example, in a brownie or lollipop
- Apply it to your skin in a lotion, spray, oil, or cream
- Place a few drops of a liquid under your tongue
How you take it is up to you. Each method works differently in your body. “If you smoke or vaporize cannabis, you feel the effects very quickly,” Bonn-Miller says. “If you eat it, it takes significantly longer. It can take 1 to 2 hours to experience the effects from edible products.”
Has the FDA approved medical marijuana?
The FDA has approved two man-made cannabinoid medicines — dronabinol (Marinol, Syndros) and nabilone (Cesamet) — to treat nausea and vomiting from chemotherapy. The cannabidiol Epidiolex was approved in 2018 for treating seizures associated with two rare and severe forms of epilepsy, Lennox-Gastaut syndrome and Dravet syndrome.
What are the side effects of medical marijuana?
Side effects that have been reported include:
The drug can also affect judgment and coordination, which could lead to accidents and injuries. When used during the teenage years when the brain is still developing, marijuana might affect IQ and mental function.
Because marijuana contains some of the same chemicals found in tobacco, there have been concerns that smoking it could harm the lungs. The effects of inhaled marijuana on lung health aren’t clear, but there’s some evidence it might increase the risk for bronchitis and other lung problems.
Columbia have legalized