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Medicinal Use of Cannabis

Medically reviewed by Drugs.com. Last updated on Aug 4, 2025.

Cannabis, also called marijuana, pot, weed, or hash, is a drug that comes from the cannabis sativa (hemp plant). The plant produces many extracts that contain chemicals. The whole plant or its extracts can help control or relieve medical or mental health conditions. The medicinal use of cannabis is also called medical marijuana. Cannabis may be taken in the form of a pill, capsule, oil, or mouth spray. Cannabis can also be smoked, baked into food, or made into tea. The effects may start right away and last for 3 to 4 hours.

DISCHARGE INSTRUCTIONS:

Call your local emergency number (911 in the US) if:

Call your doctor if:

Medical conditions or symptoms cannabis can help treat:

What you need to know about cannabis:

What you need to know about cannabinoids:

Cannabis produces chemicals called cannabinoids. The 2 main cannabinoids are called cannabidiol (CBD) and tetrahydrocannabinol (THC). These cannabinoids are separated from the rest of the marijuana plant. Cannabinoids are taken in different forms such as oils, capsules, mouth sprays, or patches.

Cannabis safety guidelines:

Follow up with your doctor as directed:

Write down your questions so you remember to ask them during your visits.

For more information:

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The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.