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Information for the Patient - Marihuana (Cannabis)

February 2006

Important: Please Read

This leaflet is published by Health Canada for patients who have been authorized by Health Canada to possess dried marihuana.

This leaflet is designed for patients based on the document Information for Health Care Professionals on dried marihuana published by Health Canada. The information in this leaflet is derived from published literature. It is a summary only and will not tell you everything about marihuana. Contact your doctor if you have any questions.

Marihuana is not an approved therapeutic product and the provision of this information should not be interpreted as an endorsement of the use of this product, or marihuana generally, by Health Canada.

Since this marihuana product has not been authorized through the Health Canada drug approval process, its safety and efficacy have not been established.

The use of this product involves risks to health, some of which may not be known or fully understood.

About This Product

What it does:

What the active ingredients might be:

What the other ingredients might be:

How this product is supplied:


Before you use marihuana always talk to your physician particularly if:

When this product should not be used

  • If you are allergic to any cannabinoid or to smoking.
  • If you have a history of serious mental disorder such as schizophrenia or depression.
  • If you are pregnant or planning to get pregnant. In addition to the risk of smoking, the use of marihuana when you are pregnant may be a risk factor for sudden infant death syndrome. Uterine exposure to marihuana may also cause behavioural (attention) problems in the child.
  • If you are nursing.
  • There may be other conditions where this product should not be used but which are unknown due to limited scientific information.

Administration of marihuana by smoking is not recommended.

Marihuana may impair your ability to drive or operate heavy machinery.

  • This can last up to 24 hours after consuming.


Interactions With This Product

Marihuana may interact with several drugs. Tell your doctor which prescription drugs, nonprescription drugs and herbal products you are currently taking, particularly:


Smoking is not recommended. Some individuals use marihuana in foods, teas or with a vaporiser.

Begin with small amounts; increase the amount of marihuana slowly.

Stop consuming if you begin to feel confused or agitated, light headed, dizzy, or if a rapid heart rate occurs.  Sit down until the feeling passes.

Usual Dose:

The dose of marihuana will be different for each person. If you haven't used marihuana or this product before, you should start with a small dose and increase it slowly until you reach a comfortable daily dose.


Symptoms of overdose are sleepiness, confusion, clumsiness, fainting, dizziness, dry mouth and fast, slow or pounding heartbeat. These are the same effects that are often experienced when you start using marihuana.  If they persist or are troublesome, call your doctor or go to the hospital.

Side Effects

From Initial Use:

From Long-term use:

How To Store It

Store in a cool, safe and secure place.

Keep this product out of reach of children

Reporting Suspected Side Effects

NOTE: Before contacting Health Canada, you should contact your physician.

To monitor drug safety, Health Canada collects information on serious and unexpected effects of drugs. If you suspect you have a serious or unexpected reaction to this product you may notify Health Canada by:

Toll-free telephone: 1-866-234-2345
Toll-free fax 1-866-678-6789
By email:

By regular mail:
Canadian Adverse Drug Reaction Monitoring Program
Health Canada
Address Locator: 0201C2
Ottawa ON  K1A 1B9

This information is from Health Canada's Website here.

For more information or if you are looking for a legal designated grower or supplier of medical marijuana please email us: