July 24, 2016


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How does Calamus work?

It is thought that chemicals in calamus cause muscle relaxation and sedation.

Are there safety concerns?

Calamus is LIKELY UNSAFE when taken by mouth. It can cause kidney damage, shaking, and seizures.

The FDA prohibits calamus use in food products because three of the four species of calamus found in the world contain a cancer-causing chemical called beta-isoasarone. However, the beta-isoasarone content can vary widely among species from 0% to 96%. Some products may be safer than others.

Special Precautions & Warnings:

Pregnancy and breast-feeding: Calamus is LIKELY UNSAFE when taken by mouth during pregnancy or breast-feeding. Avoid use.

Heart conditions: Calamus might lower blood pressure and heart rate. In theory, large amounts of calamus might worsen heart problems in some people with heart conditions.

Low blood pressure: Calamus might lower blood pressure. In theory, taking calamus might make blood pressure become too low in people with low blood pressure.

Surgery: Calamus can affect the central nervous system. It might cause too much sleepiness if combined with medications used during and after surgery. If you are using calamus despite safety concerns, stop using it at least 2 weeks before a scheduled surgery.

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Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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