Abstract
From a double-blind randomized controlled trial by 32 general practitioners on 218 patients with chronic bronchitis it appeared that sulfametopyrazine given once a week over one winter reduced the number of respiratory illnesses and the loss of time from work to about half that of a control group. It had no effect on time off work in individual spells of illness nor on the amount and purulence of sputum. Side-effects were few and mild.
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