Medications – Normal use of over the counter medications will not affect the performance of onsite systems; however, do not flush expired medicines/antibiotics into an onsite treatment system. Some prescription medications are known to cause biological disruption. Diseases or conditions which can affect septic system function include bulimia, severe infections (including AIDS), chronic diarrhea, intestinal/colon by-pass, or other gastrointestinal conditions and cancer. Oral or intravenous chemotherapy is known to severely disruption to the treatment
process and require more frequent pump-out intervals or the use of biologically based additives.