Fleet Ready To Use Enema is a useful laxative that offeres relief from constipation; and as a bowel evacuant for a variety of diagnostic; surgical and therapeutic indications. Dibasic sodium phosphate and monobasic sodium phosphate are poorly absorbent from the gastrointestinal tract and retain water in the lumen of the intestine. When administered rectally as an enema; they produce a watery evacutaion of the bowel. Fleet Enema provides cleansing actiona and induces complete emptying of the left colon usually in 2 to 5 minutes.