I would not accept that an order for medication to be administered by oral route can automatically be administered by nasogastric or PEG tube. Prior to administering (and indeed ordering) any medication via the enteral route the practitioner needs to take into account the formulation, potential interaction with feed, type of tube, site of placement, and site of drug absorption for each medication. The practitioner ordering the medication should seek the pharmacists advice or whether the medication can be administered enterally (which in most cases involves crushing or dispersion eg., Omeprazole and others eg., enteric coated - thus slow release medications cannot be crushed. Each hospital usually has a list of medications which can be administed enterally