Treatment of acute bacterial bronchitis and pneumonia with cefaclor.

Sixty patients with pneumonia and/or bronchitis were treated with cefaclor, a new orally administered cephalosporin. Of those 60, 27 adults were treated with 500 mg every 8 hours, 26 adults with 250 mg every 6 hours, and 7 children with 50 mg/kg/day. In the adults, pneumonia was caused most frequently by Streptococcus pneumoniae and Haemophilus influenzae. The 7 children had pneumococcal pneumonia. All but 2 adults, both elderly patients with chronic obstructive pulmonary disease, were successfully treated. One instance of drug hypersensitivity occurred. All 7 children responded rapidly, with no side effects, to cefaclor therapy.