I actually had gotten swollen sore nipps and broke out like crazy from SS Osta, at 12.5mg for just a week. I Definitly felt the good effects in the first few days, though I had complete insomia for the entire week. I have 2 friends taking it and they are fine, no sides or anything.. One had sore nips one morning and it went away for him, but I believe everyone is different. I don't think it could be from tainted batches. Some respond well to things some don't. My body didn't respond so well, sucks but lesson learned. Will try again with a lower dose and running some anti E.