Amoxycillin may damage infants' teeth

According to data published in the Archives of Paediatric and Adolescent Medicine (Arch Pediatr Adolesc Med. 2005;159:943-948) use of amoxycillin in patients aged between three and six months doubled the risk of fluorosis on incisor teeth at nine years.

The Abstract for this article notes:

"After adjusting for fluoride intake and otitis media, the risk of fluorosis on the maxillary central incisors from amoxicillin use during 3 to 6 months ... was still statistically significant."