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dizziness, headache, nausea, vomiting, constipation, and diarrhea. Saw palmetto does not appear to cause impotence.
Saw palmetto is thought to potentially thin the blood. Saw palmetto has been linked to excessive bleeding in a person who took it before surgery.
There is also concern that saw palmetto might cause liver or pancreas problems in some people. There have been two reports linking saw palmetto products to liver damage and one report linking saw palmetto to pancreatitis. These problems do not appear to be very common in people who take saw palmetto. But there is not enough information to know how often this might occur.
Do not take saw palmetto if:
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