Patricia Callahan ProPublica is a nonprofit newsroom that investigates abuses of power. Sign up to receive our biggest stories as soon as they’re published. Glenmark Pharmaceuticals has recalled two ...

Penicillin allergies occur when the immune ... Beta-lactam antibiotics contain a particular structure (called the beta-lactam ...

They include penicillin and its derivatives, such as methicillin and amoxicillin, as well as other groups of antibiotics known as the cephalosporins, carbapenems, and monobactams. The beta-lactam ring ...