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medical effects

Avoid cannabis completely if you are pregnant or breastfeeding. Substances in cannabis are transferred from the mother to child and can harm your unborn or newborn baby.

Using cannabis frequently can lead to a pattern of problematic use or use disorder. This can result in dependence or addiction.

Each way carries different health and safety risks.

Lowering your risks when consuming cannabis

Using cannabis frequently (daily or almost daily) and over a long time (several months or years) can:

If you’ve consumed cannabis and are experiencing particularly unpleasant or harmful effects:

For more information, please see the lower-risk cannabis use guidelines developed by Canadian experts in mental health and addiction.

Frequent use of cannabis over a long time can also harm important aspects of your thinking, like learning and memory. Stopping use can help improve these deficits. However, some of these harms may persist for months or years, or may not be fully reversible. Footnote 12 Footnote 13 Footnote 14

Heavy users of marijuana can have short-term problems with attention, memory, and learning, which can affect relationships and mood.

Marijuana is the most commonly used illegal drug in the United States, with 37.6 million users in the past year, 1 and marijuana use may have a wide range of health effects on the body and brain. Click on the sections below to learn more about how marijuana use can affect your health.

References

Marijuana also affects brain development. When marijuana users begin using as teenagers, the drug may reduce attention, memory, and learning functions and affect how the brain builds connections between the areas necessary for these functions.

Secondhand marijuana smoke

Recent studies have found strong associations between those who said there was someone in the home who used marijuana or a caretaker who used marijuana and the child having detectable levels of THC — the psychoactive ingredient in marijuana. 5,11 Children exposed to the psychoactive compounds in marijuana are potentially at risk for negative health effects, including developmental problems for babies whose mothers used marijuana while pregnant. 8 Other research shows that marijuana use during adolescence can impact the developing teenage brain and cause problems with attention, motivation, and memory. 12

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The new edition of this popular monograph features renowned experts who offer the most current information and reliable guidance on the effects of radiation exposure. They provide all the answers you need to effectively treat your patients who have been exposed to accidental, occupational, or medical radiation. Using the newest data on the molecular and genetic basis of radiation carcinogenesis, the authors offer in-depth coverage of the risks of cancer, genetic impairment, and other forms of damage caused by radiation exposure.

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The new edition of this popular monograph features renowned experts who offer the most current information and reliable guidance on the effects of radiation exposure. They provide all the answers you need to effectively treat your patients who have been exposed to accidental, occupational, or medical radiation. Using the newest data on the molecular and genetic basis of radiation carcinogenesis, the authors offer in-depth coverage of the risks of cancer, genetic impairment, and other forms of damage caused by radiation exposure.