Up to 90% of medicines are excreted unchanged.
By the way, some of these substances or their breakdown products end up in our streams, rivers, and lakes along with our wastewater. There, they pose a threat to nature and to us humans.
Source: https://www.pharmazeutische-zeitung.de/eu-verhandlungen-zu-arzneimittelrueckstaenden-starten-139298/
Photo: https://www.pexels.com/de-de/foto/nahaufnahme-von-arzneimitteln-159211/

