Fixed combination mezlocillin/oxacillin injected intramuscularly. Comparative study of local tolerability compared with ampicillin and determination of effectiveness and tolerability in the treatment of surgical and urinary tract infections.

The results of two studies on tolerability and efficacy of mezlocillin/oxacillin are reported. The pain caused by i.m. injection of 1 g (20% solution) of the fixed antibiotics combination mezlocillin/oxacillin is compared with that caused by 1 g ampicillin. The injection volume was 5 ml. The statistical analysis of the patients' statements indicates a better tolerance of the fixed antibiotics combination mezlocillin/oxacillin than of ampicillin. The second study was determined the clinical efficacy and tolerability of mezlocillin/oxacillin in the treatment of wound infections, biliary tract infections, urinary tract infections, appendicitis and peritonitis. 19/20 patients were clinically cured after about 7 days o treatment with i.m. injections of 1.5 g mezlocillin/oxacillin in 6 ml of a 25% aqueous solution t.i.d. Treatment had to be discontinued after 3 days in one case because of a generalized exanthema. No other side effects were reported. These studies show that both the i.m. injection o the 20% solution of 1 g mezlocillin/oxacillin combination and the 25% solution of 1.5 g of this combination are tolerated without problems.