Is it normal for Rinvoq 15 mg tablets to be excreted entirely?

Yes, this is normal. Rinvoq are prolonged-release tablets, i.e. the release of a medicinal substance longer than in a standard tablet. Thanks to this, the concentration of the drug in the body will remain constant for 8 to 12 hours, and sometimes up to 24 hours. What you expelled in the faeces is only the shell/skeleton of the capsule, and the change in color means that the entire content of the medicinal substance has been released from the tablet. The GdziePoLek.pl service also allows you to book Rinvoq at a pharmacy of your choice and pick up upon presentation of your prescription: https://www.gdziepolek.pl/produkty/116626/rinvoq-tabletki-o-przedluzonym-uwalnianiu/apteki?pvid=273805