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allergic reactions can occur.
Taking usnea by mouth is POSSIBLY UNSAFE. The sodium usniate (usnic acid) that usnea contains might cause liver damage. Sodium usniate is an ingredient of the brand named product LipoKinetix, which is marketed for weight loss. There were numerous cases of liver damage in people taking LipoKinetix. Symptoms, including nausea, weakness and fatigue, abdominal pain, and yellowing of the skin, usually develop from 2 weeks to 3 months after starting LipoKinetix. Symptoms disappear when it is discontinued. Additionally, there was one case of liver failure from taking pure usnic acid by mouth. Avoid taking usnea, LipoKinetix, or any other supplements containing usnea by mouth.
Special Precautions & Warnings:Pregnancy and breast-feeding: There is not enough reliable information about the safety of taking usnea if you are pregnant or breast-feeding. Stay on the safe side and avoid use.
Liver disease: Usnea contains some chemicals that might harm the liver. If you have liver disease, don't take usnea by mouth.
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.