Det blokerer visse receptorer i kroppen, de muskarine M1 - og M3- receptorer, herunder receptorerne i blæren, hvilket bevirker afslappelse af de muskler, der presser urinen ud af blæren.
It blocks some receptors in the body, the muscarinic M1 and M3 receptors, and in the bladder, this causes the muscles that push urine out of the bladder to relax.