Marijuana is an herb. It contains chemicals called cannabinoids that affect the central nervous system. Cannabinoids are found in the highest concentration in the leaves and flowers, the parts that are used to make medicine.
==Special Precautions of Marijuana==
*Pregnancy and breast-feeding: Marijuana is UNSAFE when taken by mouth or smoked during pregnancy. Marijuana passes through the placenta and can slow the growth of the fetus. Marijuana use during pregnancy is also associated with childhood leukemia. Using marijuana, either by mouth or by inhalation is LIKELY UNSAFE during breast-feeding. The dronabinol (THC) in marijuana passes into breast milk.
* In the U.S., marijuana is classified as a Schedule I controlled substance, making possession illegal. Some states, such as California, Washington, Oregon, Arizona, and others, have legalized or decriminalized the use of medical marijuana, despite objections from the federal government. Some countries such as Canada also permit the use of medical marijuana.
* The cannabinoid, dronabinol, which is found in marijuana, is LIKELY SAFE when taken by mouth appropriately as a prescription medication. Dronabinol (Marinol) is an FDA-approved prescription product.
*Marijuana is POSSIBLY UNSAFE when it is taken by mouth or smoked. It is classified as an illegal substance.
*Use of marijuana can cause dry mouth, nausea, vomiting, dry or red eyes, heart and blood pressure problems, lung problems, impaired mental functioning, headache, dizziness, numbness, panic reactions, hallucinations, flashbacks, depression, and sexual problems.
*Pregnancy and breast-feeding: Marijuana is UNSAFE when taken by mouth or smoked during pregnancy. Marijuana passes through the placenta and can slow the growth of the fetus. Marijuana use during pregnancy is also associated with childhood leukemia. Using marijuana, either by mouth or by inhalation is LIKELY UNSAFE during breast-feeding. The dronabinol (THC) in marijuana passes into breast milk.
*Heart disease: Marijuana might cause rapid heartbeat and short-term high blood pressure.
*A weakened immune system: Cannabinoids in marijuana can weaken the immune system, which might make it more difficult for the body to fight infections.