Polyethylene glycol 3350
"Recently, I found myself to strain more and more to poo in the morning. Then one morning, I couldn't go at all. As I know that my body doesn't handle missing a bowel movement well, I started looking up remedies. I decided to start with the most gentle so I started with Colace and lots of fibre and water. I still couldn't go the following day and it was getting pretty uncomfortable so I saw a Dr and she told me to use PEG. I rushed to the drug store and took 17g at noon. Soon afterwards, my cramping got worse and worse to the point where I had to lie down to get relief. The following day, I woke up and had 17g of PEG and soon after the cramping was so bad that I was thinking of going to the ER. Two hours later, a nice bowel movement happened."