A laxative drug used to treat constipation in the terminally ill who are often constipated as a side effect of opioid analgesic drugs. Dantron may colour the urine red.
(danthron) n. a stimulant *laxative administered by mouth for treating constipation in terminally ill patients; it sometimes colours the urine pink or red. It is usually combined with a faecal softener (e.g. in co-danthramer, co-danthrusate).