I was looking through the latest issue of the On-Site Installer magazine and there was a story about medications and the septic tank.  The article titled The Problem with Medications and Septic Systems  discusses mainly chemo medications but also antibiotics and provides some recommendations on how to manage your septic system if there are medications used in a home with septic systems.  The issue of On-Site Installer is the 31 MAy 2018 issue.