Hi I Have Had A Laxative But I Cannot Ember

Hi I have had a laxative but I cannot ember what it was called. It was given into the fatty part of my arm. The doctor said it would work in 30 min to 24 hours depending on the person. Boy did it ever work almost 24 hours later for me. So anyhow I'm back in the hospital and the miralax and the oral pill isn't working so good. The doctor that gave it to me is not here nor the nurse that gave it to me. After I heard the name it was something I have heard of before. Any help please???