Optimer Pharmaceuticals is marketing fidaxomicin 200 mg tablets (Dificid) for the treatment of C. difficile infections.
It is given orally for 10 days (200 mg bid) to treat infections that are proven or strongly suspected to be caused by C. difficile. Its activity is confined to the GI tract. It is indicated for those 18 years of age and older. Dosage adjustment is recommended for the elderly.