title: Clinical and pharmacological studies of ticarcillin in gram-negative infections.
abstract: Twenty-seven patients with serious gram-negative infections were treated with ticarcillin in an average daily dosage of 237 mg/kg (range, 174 to 307 mg/kg). Ticarcillin was bactericidal for all infecting organisms in concentrations ranging from 31.2 to 125 mug/ml. Five of 8 patients (62%) with overwhelming Pseudomonas pneumonia were cured or improved, and 9 of 12 (75%) were cured of pneumonia caused by other gram-negative organisms. Of six extrapulmonary infections caused by Pseudomonas, five (83%) were cured or improved. In seven cases, the infecting organism reisolated during therapy was more resistant to ticarcillin than the primary isolate. The serum half-life of ticarcillin in three patients with renal failure was 11.2 +/- 1.0 h, and during hemodialysis it decreased to 6.3 +/- 1.8 h. There were two episodes of superinfection with resistant organisms. Thirteen patients (48%) manifested eosinophilia, one of whom had severe urticaria. Prolongation of bleeding time was attributable to ticarcillin in two patients. Ticarcillin appears to be effective for therapy of serious gram-negative infections in dosages 30 to 50% less than those recommended for carbenicillin.
mesh_terms: D000328:Adult; D000368:Aged; D001424:Bacterial Infections / Q000188:drug therapy*; D002986:Clinical Trials as Topic; D005260:Female; D006801:Humans; D008171:Lung Diseases / Q000188:drug therapy; D008297:Male; D008875:Middle Aged; D010406:Penicillins / Q000627:therapeutic use*; D011552:Pseudomonas Infections / Q000188:drug therapy; D013982:Ticarcillin / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*
chemical_list: D010406:Penicillins; D013982:Ticarcillin