Levonorgestrel
"I decided to share my experience to add a positive review about the Mirena IUD. I had my IUD inserted about a week ago. Going in for the insertion I was terrified based on all the reviews I read online referring to the pain. An hour before my appointment I took 800mg of ibuprofen, my gyno didn’t recommend anything else before the insertion. When the insertion started, I kept waiting for the worst pain of my life to come but it didn't. The pain was about 4/10, but I wouldn’t even consider it pain, uncomfortable may be a better word (sharp cramping but bearable) My period is already much lighter than usual to the point that I’m only wearing panty liners (I never had very heavy periods previously and I’ve been on the pill for about 5 years)"