Bad reactions to commonly-prescribed antibiotics cause more than 140 thousand emergency room visits a year, that's according to researchers at the CDC.
Experts there used an electronic surveillance system to study the number of emergency room visits in 63 hospitals.
They found 6,600 visits were due to antibiotic reactions, which they say comes out to roughly 142,000 visits nationwide. Penicillin and Amoxicillin accounted for half the visits.
Experts say even though antibiotics are commonly used, they can still cause side effects and should only be administered when absolutely necessary.