“…On the other hand, an impaired absorption capacity of the gastrointestinal tract due to compromised peristalsis reduces the oral bioavailability of drugs [40]. Lastly, the possibility of a pharmacogenetically determined, altered metabolism of analgesics should also be considered in EDS [41,42]. In practice, it has proven useful to start with low doses and, if possible, to initially avoid combining several substances in order to be able to directly assign unexpected reactions to a specific preparation.…”