Actually it happened all four times (the last one I did yesterday). Yesterday I halved the dose and today I have almost 38 of fever. It lasts two days, then it passes. I am careful about hygiene, I always disinfect myself. This problem has never happened to me with the same product as the med-tech. Since the product is red, I thought the problem was an excipient or something else that bothers me. That's why I asked here, maybe someone else has already happened