Intravenous antibiotics are more expensive than oral equivalents and some are very expensive, they also put patients at risk of IV cannula infections. Oral antibiotics are usually fairly cheap. IM injections are rarely, if ever, indicated.

Course lengths:
Prescriptions for oral antibiotics for in-patients should be reviewed at or before five days. Prescriptions for intravenous antibiotics should be reviewed at or before 48 hours, after which the patient should be considered for an oral antibiotic, if there is an equivalent available (see IV to oral switch policy). For uncomplicated urinary tract infections, three days treatment is usually sufficient in adult women. Complicated infections require longer treatment.

When initiating therapy with agents marked with , you must seek Microbiology/Infectious Diseases advice.

The restricted antimicrobials may be prescribed without discussion with microbiology if they are being used for an approved indication as specified. Use outside these indications (and any use for some antimicrobials) requires DOCUMENTED approval from one of the medical microbiologists or Infectious Diseases Physician prior to prescribing.