Side Effects

Marijuana plant

If you have any questions about the following information, please contact the Poison and Drug Information Center at: 1-800-222-1222

Possible negative side effects from smoking or eating marijuana are listed below. 

If you have any of these side effects, call the Poison and Drug Information Center at 1-800-222-1222 for instructions.


  • Anxiety
  • Difficulty walking
  • Dizziness
  • Drowsiness
  • Slurred speech
  • Disorientation
  • Loss of consciousness
  • Depression
  • Lack of motivation
  • Paranoia
  • Panic disorder
  • Headaches
  • Memory problems
  • Mood swings
  • Hallucinations
  • Impaired reaction time


  • Coughing or wheezing
  • Shortness of breath


  • Dizziness (or low blood pressure) when rising
  • Increase or decrease in heart rate
  • Heart arrhythmias (rare)



Stomach / Intestinal

  • Increased appetite
  • Dry mouth
  • Pancreatitis (rare)


Difficulty urinating

***Withdrawal side effects following cessation after long term use: increased irritability, anxiety, nervousness, restlessness, sleep difficulties, and aggression.