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Herbs & Supplements
Saw Palmetto
Other Names: Cabbage Palm, Fan Palm, Sabal, Sabal serrulata, Scrub Palm, Serenoa, Serenoa repens
What interactions should I watch for?
Prescription Drugs
In studies and case reports, saw palmetto has been shown to increase the time blood needs to clot. When it is taken with an antiplatelet or an anticoagulant drug, the effect of the drug may be increased, resulting in uncontrolled bleeding.
- Antiplatelets include clopidogrel and Ticlid
- Anticoagulants include heparin and warfarin
Because it has hormonal activity, saw palmetto may interfere with the effectiveness of oral contraceptives and hormone replacement therapy.
Non-prescription Drugs
Saw palmetto can affect the ability of blood to clot after an injury. Aspirin can also delay clotting, so saw palmetto should not be taken at the same time aspirin is being taken.
Herbal Products
If saw palmetto is used with other herbs that affect blood clotting, bleeding may occur. Individuals who take any herbal product should check with a pharmacist to see if it affects blood clotting. Some of the most common herbal products with possible inhibiting effects on blood clotting are:
- Danshen
- Devil's Claw
- Garlic
- Ginger
- Ginkgo
- Ginseng
- Horse Chestnut
- Papain
- Red Clover
Some interactions between herbal products and medications can be more severe than others. The best way for you to avoid harmful interactions is to tell your doctor and/or pharmacist what medications you are currently taking, including any over-the-counter products, vitamins, and herbals. For specific information on how saw palmetto interacts with drugs, other herbals, and foods and the severity of those interactions, please use our Drug Interactions Checker to check for possible interactions.
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Note: The above information is not intended to replace the advice of your physician, pharmacist, or other healthcare professional. It is not meant to indicate that the use of the product is safe, appropriate, or effective for you.
In general, herbal products are not subject to review or approval by the U.S. Food and Drug Administration (FDA). They are not required to be standardized, meaning that the amounts of active ingredients or contaminants they contain may vary between brands or between different batches of the same brand. Not all of the risks, side effects, or interactions associated with the use of herbal products are known because few reliable studies of their use in humans have been done.
This information is provided for your education only. Please share this information with your healthcare provider and be sure that you talk to your doctor and pharmacist about all the prescription and non-prescription medicines you take before you begin to use any herbal product.
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What interactions should I watch for?
