The efficacy of a new formulation of trimethoprim and sulphadiazine in acute exacerbations of chronic bronchitis.

Thirty-four acute exacerbations of chronic bronchitis were treated using a new formulation of trimethoprim and sulphadiazine. Significant bacterial isolates were obtained in 18 exacerbations of which 12 comprised Haemophilus influenzae. Adverse effects of treatment, principally nausea, occurred in 5 patients. A satisfactory clinical response in association with the achievement of mucoid sputum was obtained in 94% and the mean time for sputum conversion of 3.8 days compares favourably with other antibiotics.