Report a side effect (adverse reaction) to cannabis: Health care professionals
Health care professionals who suspect a side effect (adverse reaction) to cannabis are strongly encouraged to report it. Talk to your patients about signs to watch for. You may also report a side effect to cannabis based on a suspicion. This does not necessarily mean the cannabis caused the reaction. If in doubt, report the side effect.
View the printable version of the Side effect reporting form. You can also report by telephone by calling 1-866-234-2345 (toll-free).
Note: All personal information you submit is protected under the Privacy Act. This includes information related to the identity of the consumer or patient and the identity of the person who is reporting the information (reporter).
You are encouraged to report to Health Canada any side effect regardless of:
- its source (for example, legal, illegal or unknown)
- its use with other suspect or concomitant products
- whether it's used for medical or non-medical purposes
The Report a side effect form requires a Drug Identification Number (DIN), a Natural Product Number (NPN) or a product name in Section D. For side effects involving cannabis, you only need to provide the cannabis product name, or any available information if the product name is unknown (for example, cannabis vape).
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