Skip to main content
Close Menu
man with hat looking at field

Potential Risks and Side Effects of Marijuana

Marijuana’s efficacy may vary, and side effects are possible. Each person responds differently, and particular strains will not always be effective. The effectiveness of a marijuana strain will be dependent on your personal response and sensitivity to the chemical makeup of the product.

What Are the potential short-term side effects of marijuana use?

You should also be aware that marijuana use may also cause short-term effects related to:  

Sense of time

Has been shown to distort an individual’s perception of time, typically slowing time down.

Attention span

Long-term use can have an adverse effect on attention span.


Can diminish or impair an individual’s problem-solving skills.

Verbal fluency

Long-term use can have an effect on one’s verbal memory or ability to recall words.

Reaction time

Has been shown to impair one’s reaction time.

Psychomotor control

Certain psychomotor skills may be influenced by use.

What medications should medical patients ask their doctors about before using marijuana?

You should always check with your doctor, practitioner or pharmacist on potential interactions with any medication you are currently taking. Ask your doctor if your use of the following medications should be adjusted with the use of medical marijuana:

  • Anticoagulants
  • Antiplatelets

  • Aspirin
  • Barbiturates
  • Benzodiazepines
  • Dronabinol
  • Narcotics
  • Phenobarbital
  • Sedating anticholinergics

  • Sedative hypnotics
  • SSRI
  • TCA
  • Theophylline

Marijuana usage and precautions for health conditions

You should take precautions before using marijuana if you have:

  • Are on blood thinners
  • Have Hypotension
  • Have low blood sugar

What medical conditions should not be mixed with marijuana?

You should not use marijuana if you have any of the following conditions:

  • Asthma & COPD (no inhalation)
  • Hypersensitivity to cannabinoids
  • Hypertension
  • Impaired immune system
  • Ischemic heart disease

Do not use marijuana if you:

  • Are pregnant, may be pregnant, or are trying to conceive
  • Are breastfeeding


This website contains cannabis information and is restricted to individuals 21 years of age or older. Please confirm your age:

  • IL
  • MD
  • MA
  • NY
  • OH
  • PA
For the best experience, please select a state.

By entering the website, you accept our use of cookies and agree to our Privacy Policy & Terms of Use