[Reversible tooth discoloration during oral use of antibiotics].

From January 1991 until June 1995. 25 cases were reported to the Netherlands Pharmacovigilance Foundation LAREB of yellow to brown tooth discoloration following the oral use of medication; 21 cases (84%) involved antibiotics, of which 14 were amoxicillin. 17/21 patients were children, with ages ranging from 1 to 10 years. All children used liquid formulations (suspension or solutabs). Discoloration was reversible in all cases, but had a protracted course in some. Presumably a pigment precipitated on (and not in) the teeth, but the nature of the pigment was uncertain.