Monobasic Sodium Phosphate Monohydrate + Dibasic Phosphate Heptahydrate (Colema) 19g/7g/118ml Rectal Solution is a laxative used for bowel cleansing. It contains a combination of monobasic sodium phosphate monohydrate and dibasic phosphate heptahydrate, which work together to stimulate bowel movements. This solution is typically used to relieve constipation or prepare the bowel before medical procedures. The solution is administered rectally and comes in a 118ml bottle for effective use as a cathartic.