This is the protocol for a review and there is no abstract. The objectives are as follows:
To evaluate the risk/benefit profile of interventions used to prevent upper gastrointestinal bleeding in people admitted to level 2 and level 3 intensive care units*
* Level 2 intensive care units: patients requiring detailed observation or intervention including support for a single failing organ system or postoperative care, and those stepping down from higher levels of care.
Level 3 intensive care units: patients requiring advanced respiratory support alone or basic respiratory support together with support for at least two organ systems.
These levels include all sick patients requiring support for organ failure/dysfunction in intensive care units (Goldhil 2002).