[Studies of sustained release cephalexin (S-6437) in pediatrics (author's transl)]

S-6437 is granule of sustained-release cephalexin which is prepared as longer acting cephalexin. Each gram of the granule contains 200 mg of cephalexin. Absorption and excretion study of this preparation was performed in 8 patients (3 school children, 3 infants and 2 babies). Mean blood levels of cephalexin following a single oral administration of 25 mg/kg in the school children, for instance, were 1.73, 2.47, 3.11, 2.28, 3.84 and 2.86 mcg/ml at 0.5, 1.0, 2.0, 4.0, 6.0 and 8.0 hours, respectively. Fifty-two patients with acute respiratory tract infections were treated with this preparation and out of the 52, 33 were evaluable cases. The daily dose used was 50 mg/kg divided in two doses. Of the 33 patients 29 responded to this preparation showing 87.8% of effectiveness. Four patients who did not respond were 1 with acute pharyngitis, 2 with acute tonsillitis, and 1 with acute bronchitis. No severe side effects due to this preparation were observed.