Phenolphthalein (Phenolphthaleinum; synonymous with Purgen Purgenum) - a laxative. Phenolphthalein has an effect mainly on the colon, enhancing its peristalsis. Purgen used for chronic constipation. Appoint 0.1-0.3 g per day. With long-term use of phenolphthalein possible accumulation and irritation of the kidneys. The form of release: tablets of 0.05 and 0.1, See also Laxatives.