The following information is taken from NICE CG32- Nutrition support in adults (February 2006).

• Feed via a tube into the stomach unless there is upper GI dysfunction
• In people with upper GI dysfunction or an inaccessible GI tract, consider duodenal or jejunal feeding
• Use gastrostomy for long-term enteral feeding (>4 weeks)
• PEG tubes can be used 4 hours after insertion
• Use bolus or continuous delivery when feeding into the stomach taking into account patient preference, convenience and drug administration
• In intensive care patients having nasogastric enteral tube feeding, deliver continuously over 16-24 hours daily
• If insulin is needed, give feed over 24 hours
• If intestinal tolerance limits enteral tube feeding in surgical or critical care patients, use parenteral nutrition to supplement or replace enteral tube feeding
• Give a motility agent e.g. metoclopramide, to patients who have delayed gastric emptying. If this is ineffective consider post-pyloric enteral tube feeding and/or parenteral nutrition

Please see products listed here: Formulary choice oral nutritional supplements