After about a year and a half of getting domestic Medytox, I don't know if it's a side effect, but the muscles themselves just got hard and I couldn't get any strength, but it was so painful and it felt so hot... So I got it from another place, Germany, because it was cheap, and I definitely seem to be developing resistance to the domestic product. Overall, my muscles were flaccid. If you have empty stomach, be sure to get a foreign product, not a domestic one . The problem was with the type of Botox. The doctor placed it on the muscle properly, leaving no bruising. It was the best. I want to write down the name of the hospital, but it doesn't appear.