Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.
[Influence of yang-restoring herb medicines upon metabolism of thyroid hormone in normal rats and a drug administration schedule].
A heart arrhythmia has also been reported in a man who took horny goat weed in a commercial product used for sexual enhancement.
Research also shows that a specific multi-ingredient commercial product (Enzyte, Berkeley Premium Nutraceuticals) that contains horny goat weed might cause abnormal heart beats when measured by an electrocardiogram.
Taking large amounts of horny goat weed might cause spasms and severe breathing problems.
These changes might increase the chance of having a heart arrhythmia.
However, since these products contain multiple ingredients, it is not clear if these effects are caused by horny goat weed or other ingredients.
Iinuma, M., Tanaka, T., Sakakibara, N., Mizuno, M., Matsuda, H., Shiomoto, H., and Kubo, M.
[Chemical constituents of the root of Epimedium acumiantum Franch].