Hi Rp
I don't think it will effect your sperm itself, but it can effect your circulatory system.
Here is a link that talks of the risks of this drug:http://altmedicine.about.com/cs/allergiesasthma/a/Ephedra.htm
Hope that helps!
Kerry
Nurse (RN)
35 years in Nursing: OB/GYN, Peds, Oncology, hospice, Ortho, Neuro, Addiction, Recovery, Geriatrics,