Introduction An enema is the introduction of any substance into the rectum. If the liquid used for enemas does not pose a danger to humans, such enemas are called medicinal. Mainly, these are enemas containing hydrogen peroxide, soda, magnesia, glycerin, calcium chloride and other substances. Their therapeutic effect is based on the property of these substances to have a chemical effect on the rectum or directly act on its organs. The speed of irrigation used is of great importance, increasing it can also