What is a good enema for constipation?

Everyday Health states that the Fleet Phospho-soda enema is considered to be the most effective enema for constipation. It contains a salt called sodium phosphate to help intestines retain water and comes with a disposable nozzle and squeeze bag. Exact dosage must be used to prevent harmful side effects.

Everyday Health states that the Fleet enema remedies constipation by injecting stool-softening liquid into the intestines through the rectum. While the liquid softens the stool, the enema nozzle also relaxes the rectum. Both actions remedy the constipation by stimulating a substantial bowel movement. Although often effective, enemas are recommended only as a last resort for constipation.