Efficacy of empirically prescribed amoxicillin and amoxicillin + clavulanic acid in children's reactive arthritis: a randomised trial.

Amoxicillin or amoxicillin + clavulanic acid in 10- to 14-day courses are advisable, in addition to the antirheumatic treatment, for children in the early stage of ReA when the arthritis-triggering microorganism is not identified.