birth control
"In the first few months that I was on this drug I had a a few side effects. I had some spotting between periods, not much, but some. The real issues was that I was ridiculously fatigued all the time. I constantly wanted to sleep and every nap I took would last hours. The spotting went away after a month or two and the fatigue went away after about 2/3 months. The only side effect I have now is a lowered sex drive. 

I used to get very heavy periods that lasted 7 full days with bad cramps almost every day. The very first period I had on this drug was already shortened by a day or two and now almost a year later I barely even bleed anymore. I could do without the lowered sex drive but as a whole I have no complaints about my experience."