Re: <enema ingredients>
If you have a regular doc, you should visit & discuss if this is an ongoing concern.
In the meantime, for emergency relief, it's easiest to use a prepared enema that can be purchased at the drug store for a few bucks. One brand is called Fleet; oftentimes there are generic brands as well. The 2 main kinds of enemas are saline & lubricating. A saline enema is hypertonic, drives water into your bowel, which can give some strong urges & cramping. A lubricating enema contains oil or mineral oil, which usually causes less cramping, just makes the passageway slippery to ease evacuation of hard stool.
I recommend trying a disposable prepared enema over a DIY experience, which can be messy & frustrating without special equipment and/or an assistant.