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diarrhea. About 8% of the people participating in one research study developed diarrhea. Other possible side effects include nausea, vomiting, abdominal pain, headaches, ringing in the ears, loss of appetite, and loss of taste. It can also cause allergic skin reactions, menstrual problems, and changes in blood pressure.
However, not enough is known about the safety of using devil's claw long-term or applying it to the skin.
Special Precautions & Warnings:Pregnancy and breast-feeding: Devil's claw is POSSIBLY UNSAFE. It might harm the developing fetus. Avoid use in pregnancy. It is also best to avoid using devil's claw while breast-feeding. Not enough is known yet about its safety during breast-feeding.
Heart problems, high blood pressure, low blood pressure: Since devil's claw can affect heart rate, heartbeat, and blood pressure, it might harm people with disorders of the heart and circulatory system. If you have one of these conditions, talk with your healthcare provider before starting devil's claw.
Diabetes: Devil's claw might lower blood sugar levels. Using it along with medications that lower blood sugar might cause blood sugar to drop too low. Monitor blood glucose levels closely. Your healthcare provider might need to adjust your dose of diabetes medications.
Gallstones: Devil's claw might increase bile production. This could be a problem for people with gallstones. Avoid using devil's claw.
Peptic ulcer disease (PUD): Since devil's claw might increase the production of stomach acids, it might harm people with stomach ulcers. Avoid using devil's claw.
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.