Sulfadiazine is an antibiotic called sulfanilamide.Although sulfadiazine antibiotics are now rarely prescribed, sulfadiazine is still a useful drug to help prevent the recurrence of rheumatic fever, which is caused by a bacterial infection called streptococcus and can cause serious damage to the heart.There is a risk of further illness after the first episode, so long-term
use of antibiotics such as sulfadiazine is needed to help prevent it.Sulfadiazine is occasionally prescribed for other reasons.
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