Marijuana (also known as cannabis, weed, or pot) is the leaves, stems, seeds, and dried, crushed flowers of a cannabis plant. There are over 100 chemicals in the cannabis plant called cannabinoids. The most common cannabinoids are THC and CBD.

  • Delta-9-tetrahydrocannabinol (THC) is a mind-altering chemical in marijuana.
    THC is what makes users high.
  • Marijuana also contains the chemical cannabidiol (CBD). It does not make users high.



  • The most mind-altering cannabinoid.
  • It can change a user’s mood and sense of time. It can also make users more hungry (increased appetite).
  • Will show up on a drug test.
  • Comes from the leaves and flowers of the cannabis plant.
  • There is more THC in the Cannabis sativa plant. There is still some THC in the Cannabis indica plant.
  • Oils from the cannabis plant have high amounts of THC.
  • Is not mind-altering or toxic.
  • May make users feel calm or sleepy.
  • Reduces the effects of THC.
  • It will show up on a drug test if it’s been prepared with anything that has THC in it.
  • Comes from the stalk, flowers, and leaves of the cannabis plant. Can also be taken from low-THC hemp.
  • There is more CBD in the Cannabis indica plant. There is still some CBD in the Cannabis sativa plant.


How it is Used

The most common way people use marijuana is by smoking, eating, or drinking it. There are different ways to do each of these.


  • Joint: a rolled marijuana cigarette
  • Blunt: a rolled marijuana cigar
  • Bong: a water-filled device used to filter and cool marijuana smoke
  • Hand pipe: small handheld device used to burn marijuana. Often called a bowl.
  • Vape pens: a handheld device that looks like an ink pen or USB drive that is used for vaping. It turns marijuana oil into a vapor that can be smoked.
  • Dab: a highly concentrated form of marijuana that looks gummy or like wax. It is used with a special type of bong called an oil rig to make a vapor that is breathed in (inhaled).

Eating or Drinking

  • Edible: food, usually candy or dessert, that have heated up (cooked) marijuana
    in it (Picture 1)
  • Tea: marijuana is brewed and drank
    like tea
  • Capsule or pill: marijuana that is taken
    in pill form
  • Tincture: liquid marijuana that’s put
    in the mouth using a dropper

Signs and Symptoms

Signs of marijuana use is different for each person. Some common signs are:

  • Red eyes
  • Weight gain
  • More tired
  • Skunk-like smell on clothes or hair
  • Bad coordination
  • Less or no energy
  • Dry mouth
  • Anxiety
  • Poor judgment

Items to Look For 

If you think your child might be using marijuana, look for these items they may have:

What to Do

  • Have regular, open conversations with your child. Make sure to ask questions and listen. Discuss the risks of marijuana (page 4), but also related issues like peer pressure, stress, and healthy ways to cope with problems.
  • Get to know your children’s friends. Most children and teens that use marijuana say they tried it first with a friend.
  • Encourage positive activities like sports, music, religious group, or a part-time job.
  • Look at what your child is posting online. They may have posted about using marijuana on social media.
  • Your child may benefit from meeting with a behavioral health professional. Their family doctor or health care provider can provide a referral.


Marijuana has many health and lifestyle risks. Some examples are:

  • Short-term memory problems
  • Lung conditions or breathing problems
  • Addiction – feeling like you need marijuana and want it more and more
  • Withdrawal – when you stop using marijuana and feel cranky, sad, or anxious. Users may also have sleeping problems if they’re going through withdrawal.
  • Mental health disorders – a higher chance of mood and anxiety problems, or thoughts of self-harm or suicide
  • Slower reaction time and hand-eye coordination
  • Poisoning – children may mistake edibles as regular food or candy. Edibles can make
    them very sick.
  • Drug tests – THC will show up on a drug test. This could lead to losing a job.
  • Pregnancy – smoking marijuana while pregnant may cause a baby to be born early (premature). The baby may weigh less than other babies when born.


Marijuana (PDF), Nepali (PDF), Somali (PDF), Spanish (PDF)

HH-IV-261 ©2022, Nationwide Children’s Hospital