title: Routine H2-receptor antagonists before elective surgery?
mesh_terms: D005069:Evaluation Studies as Topic; D006635:Histamine H2 Antagonists / Q000627:therapeutic use*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D011015:Pneumonia, Aspiration / Q000517:prevention & control*; D011292:Premedication; D013514:Surgical Procedures, Operative
chemical_list: D006635:Histamine H2 Antagonists