Amoxicillin and ampicillin: rashes equally likely.
D000658:Amoxicillin / Q000009:adverse effects*; D000667:Ampicillin / Q000009:adverse effects*; D003875:Drug Eruptions / Q000209:etiology*; D006801:Humans
D000667:Ampicillin; D000658:Amoxicillin