title: Sulfametopyrazine in the prophylaxis of exacerbations of chronic bronchitis.
mesh_terms: D000208:Acute Disease; D000667:Ampicillin / Q000627:therapeutic use; D001291:Attitude of Health Personnel; D001294:Attitude to Health; D001991:Bronchitis / Q000517:prevention & control*; D002908:Chronic Disease; D002986:Clinical Trials as Topic; D003692:Delayed-Action Preparations; D006801:Humans; D008297:Male; D010919:Placebos; D011719:Pyrazines / Q000009:adverse effects / Q000627:therapeutic use; D013183:Sputum; D013449:Sulfonamides / Q000009:adverse effects / Q000627:therapeutic use*
chemical_list: D003692:Delayed-Action Preparations; D010919:Placebos; D011719:Pyrazines; D013449:Sulfonamides; D000667:Ampicillin