Original laboratory sample of "M & B 693," England, 1938. M & B 693 was one of the first generations of sulphonamide antibiotics, produced for the first time in 1938. The first chemical cure for pneumonia, it was hailed as a wonder drug. M & B 693 could also prevent the growth of the blood-poisoning bacteria in wounds and was used to protect against gangrene. It could either be taken in tablet form or the powder could be placed in wounds. It was used so widely during the Second World War that May & Baker had difficulty keeping up with demand. It was later largely superseded by penicillin and sulphonamides.