For more on the health risks and effects of marijuana, visit CDC’s web page on marijuana and health effects
Marijuana—which can also be called cannabis, weed, pot, or dope—refers to the dried flowers, leaves, stems, and seeds of the cannabis plant. The cannabis plant contains more than 100 compounds (or cannabinoids). These compounds include tetrahydrocannabinol (THC), which is impairing or mind-altering, as well as other active compounds, such as cannabidiol (CBD). CBD is not impairing, meaning it does not cause a “high”.
 National Academies of Sciences, Engineering, and Medicine. The health effects of cannabis and cannabinoids: the current state of evidence and recommendations for research. Washington, DC: The National Academies Press; 2017.Source: What is marijuana?
 Schauer GL, Njai R, Grant-Lenzy AM. Modes of marijuana use – smoking, vaping, eating, and dabbing: Results from the 2016 BRFSS in 12 States. Drug Alcohol Depend. Apr 1 2020;209:107900.
 Schauer GL, King BA, Bunnell RE, Promoff G, McAfee TA. Toking, vaping, and eating for health or fun: marijuana use patterns in adults, US, 2014. American Journal of Preventive Medicine. 2016;50(1):1-8.
Source: How is marijuana used?
 Moir D, Rickert WS, Levasseur G, et al. A comparison of mainstream and sidestream marijuana and tobacco cigarette smoke produced under two machine smoking conditions. Chemical Research in Toxicology. 2008;21(2):494-502.Source: Can secondhand marijuana smoke affect nonsmokers?
Breastfeeding persons are encouraged to avoid using marijuana. The health effects of a breastfeeding person’s use of marijuana on her infant are not yet fully known, and the available data are limited and conflicting. However, we know that chemicals from marijuana can be passed to a baby through breast milk. In addition, tetrahydrocannabinol (THC) is stored in body fat and is slowly released over time, meaning that a baby could still be exposed even after a breastfeeding person stops using marijuana.
 Ryan SA, Ammerman SD, O’Connor ME. Marijuana use during pregnancy and breastfeeding: implications for neonatal and childhood outcomes. Pediatrics. 2018;142(3).
Source: Is it safe for a breastfeeding person to use marijuana?
 Yurasek AM, Aston ER, Metrik J. Co-use of alcohol and cannabis: A review. Current Addiction Reports. 2017;4(2):184-193.
 Antoniou T, Bodkin J, Ho JM. Drug interactions with cannabinoids. CMAJ. 2020;192(9):E206.
Source: What are the effects of mixing marijuana with alcohol, tobacco, or prescription drugs?
 ElSohly MA, Mehmedic Z, Foster S, Gon C, Chandra S, Church JC. Changes in cannabis potency over the last 2 decades (1995–2014): analysis of current data in the United States. Biological Psychiatry. 2016;79(7):613-619
 Mauro PM, Carliner H, Brown QL, et al. Age Differences in Daily and Nondaily Cannabis Use in the United States, 2002-2014. Journal of Studies on Alcohol and Drugs. 2018;79(3):423.
Source: Is it possible for someone to become addicted to marijuana?
The marijuana plant has compounds that may help symptoms for some health problems.1 While more states are making it legal to use the plant as medicine for certain conditions, scientists are still learning the ways that marijuana may help or harm people. For example, smoked marijuana may damage your lungs and respiratory system.1
Certain compounds in marijuana products may affect your brain or body in harmful ways. In addition, no federal standards have been implemented for the quality and safety of marijuana products sold in state-based medical marijuana dispensaries. These products are not approved by the FDA.
Research on the medical use of marijuana is still in early stages, and much remains unknown about the plant and how it interacts with the body. Currently, the FDA has approved one plant-based marijuana drug (Epidiolex), which contains purified cannabidiol (CBD) from the marijuana plant. The drug is approved for treating seizures associated with two rare and severe forms of epilepsy (Lennox-Gastaut syndrome and Dravet syndrome) as well as seizures associated with tuberous sclerosis complex, a rare genetic disorder that causes benign tumors to form in many parts of the body.
The FDA has also approved two medicines (dronabinol [brand names: Marinol and Syndros] and nabilone [brand name: Cesamet]) made from a synthetic or lab-made chemical that mimics tetrahydrocannabinol (THC). These medicines are used to treat nausea in patients with cancer who are having chemotherapy treatment and to increase appetite in individuals with AIDS who do not feel like eating (wasting syndrome).
Source: Is marijuana medicine?