"i was taking yaz for about 6-7 months and had great results with decreased acne and shorter menstrual periods. however, the more i read about the drug, the more concerned i became about some of the side effects other people were having. however, i am not the type of person to imagine that side effects are happening to me. i have always tolerated most medications pretty well. so i thought everything was going well with yaz. about 6-7 months into it, i started noticing that i was having a lot of muscle twitching. it was subtle at first but then it was constant. i finally went to my doctor and she said that i most likely had increased potassium, causing an electrolyte imbalance. (which can be very dangerous if untreated). hope this helps."