Polyethylene glycol 3350
"I am 14 years old and was taking an anti-inflammatory medicine as well as a prescription pain killer for my kidney stone that I have. Those medicines made me constipated, and while I was at Childrens ER, my nurse practitioner prescribed me MiraLax. I was skeptical, and afraid that it would counteract with my other medications. She assured me that it would be okay. Did you know, you don't have to take it just once a day? I took 2 doses at once with 16 ounces of water, and a couple of hours later, I finally had a bowel movement. Overall this medication is really phenomenal. The only bad thing about it, is that it causes gas and nausea. Other than that, I'd say this is the best constipation reliever for all ages out there!"