This is the protocol for a review and there is no abstract. The objectives are as follows:
To assess the effectiveness and safety, for women and babies, of routine prophylactic drugs given to women during normal labour for reducing the incidence of gastric aspiration and the effects of possibly inhaling stomach contents (gastric aspiration/Mendelson's syndrome) should regurgitation occur. The review will consider those interventions given routinely to all women in labour compared with no interventions/placebo, compared with other drugs for this purpose, and compared with combinations of drugs for this purpose. Subanalysis on women considered at high risk of needing anaesthesia will be undertaken if data are available.