Marijuana

Source: MedlinePlus Health Topics, U.S. National Library of Medicine

Last synced 8/15/2026Status: primary verified

What is marijuana? Marijuana is a green, brown, or gray mix of dried, crumbled parts from the marijuana plant. The plant contains chemicals which act on your brain and can change your mood or consciousness. How do people use marijuana? There are many different ways that people use marijuana, including: Rolling it up and smoking it like a cigarette or cigar Smoking it in a pipe Mixing it in food and eating it Brewing it as a tea Smoking oils from the plant ("dabbing") Using electronic vaporizers ("vaping") What are the effects of marijuana? Marijuana can cause both short-term and long-term effects. Short term: While you are high, you may experience: Altered senses, such as seeing brighter colors Altered sense of time, such as minutes seeming like hours Changes in mood Problems with body movement Trouble with thinking, problem-solving, and memory Increased appetite Long term: In the long term, marijuana can cause health problems, such as: Problems with brain development. People who started using marijuana as teenagers may have trouble with thinking, memory, and learning. Coughing and breathing problems, if you smoke marijuana frequently Problems with child development during and after pregnancy, if a woman smokes marijuana while pregnant Can you overdose on marijuana? It is possible to overdose on marijuana, if you take a very high dose. Symptoms of an overdose include anxiety , panic, and a rapid heartbeat. In rare cases, an overdose can cause paranoia and hallucinations. There are no reports of people dying from using just marijuana. Is marijuana addictive? After using marijuana for a while, it is possible to get addicted to it. You are more likely to become addicted if you use marijuana every day or you started using it when you were a teenager. If you are addicted, you will have a strong need to take the drug. You may also need to smoke more and more of it to get the same high. When you try to quit, you may have mild withdrawal symptoms such as: Irritability Troub

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This information is for general education and is not medical advice. Always talk to a licensed U.S. clinician about your situation, medications, or treatment decisions.