Pharmacology All India exam a3d1a9e5 LES pressure is decreased by all except A Alcohol B Fat C Protein D Peppermint High-Yield Explanation LES pressure- 10-25mm Hg LES presssure decreased by Alcohol, smoking, fat Coffee, Chocolate, Mint Barbiturates, Atropine, diazepam, theophylline Ref; katzung 12th ed.