The disclosure is directed to new crystalline tebipenem pivoxil salt forms, including a crystalline tebipenem pivoxil ethane sulfonate salt form (Form A), a crystalline tebipenem pivoxil ketoglutarate salt form (Form A), tebipenem pivoxil maleate salt forms (Form A and Form B), a tebipenem pivoxil malate salt form (Form A), a tebipenem pivoxil methane sulfonate salt form (Form B), a tebipenem pivoxil hydrobromide salt form (Form B), and a tebipenem pivoxil edisylate salt form (Form A). The disclosure also includes a composition, comprising a crystalline tebipenem pivoxil salt and a pharmaceutically acceptable carrier and further includes a method for treating an antibiotic resistant bacterial infection, comprising administering to a patient in need of such treatment a therapeutically effective amount of a crystalline tebipenem pivoxil salt.
