What herbs and supplements can interact with marijuana?

Cannabis may increase blood sugar levels. However, other research suggests that cannabis may reduce the incidence of diabetes. Caution is advised when using herbs or supplements that may affect blood sugar. Blood glucose levels may require monitoring, and doses may need adjustment.

Cannabis may increase the risk of bleeding when taken with herbs and supplements that are believed to increase the risk of bleeding. Multiple cases of bleeding have been reported with the use of Ginkgo biloba, and fewer cases with garlic and saw palmetto. Numerous other agents may theoretically increase the risk of bleeding, although this has not been proven in most cases.

Cannabis may cause low blood pressure. Caution is advised in patients taking herbs or supplements that lower blood pressure.

Cannabis may increase the amount of drowsiness caused by some herbs or supplements with central nervous system depressant or sedative properties.

Cannabis may interfere with the way the body processes certain herbs or supplements using the liver's cytochrome P450 enzyme system. As a result, the levels of other herbs or supplements may change in the blood. It may also alter the effects that other herbs or supplements potentially may have on the P450 system.

Because cannabis contains estrogen-like chemicals, the effects of other herbs or supplements believed to have hormonal or estrogen-like properties may be altered.

Cannabis may also interact with anticancer herbs and supplements, antioxidants, antiseizure herbs and supplements, antivirals, herbs and supplements that affect the immune system, herbs and supplements that affect the respiratory system, herbs and supplements that may damage the liver, herbs and supplements that treat nausea and vomiting, painkillers, p-glycoprotein modulators, and herbs or supplements that widen blood vessels.

You should read product labels, and discuss all therapies with a qualified healthcare provider. Natural Standard information does not constitute medical advice, diagnosis, or treatment.