topical: administered on the skin surface and provide a local or systemic effect,
transdermal: contained in a disk or patch applied to the skin, with systemic effects-constant release controlled amounts over period of time, over 24 hours or more-example nitroglycerin for angina or chest pain
inhalation: nubulizers (vaporizes a liquid med into a fine mist that can be inhaled with a face mask), dry powder inhalers or DPI (small device used for powdered drugs), metered dose inhalers or MDI (uses a propellant to deliver a measured dose of medication with each inhalation).
Solutions and ointments: applied to the mucosa of the eyes (optic), nose (nasal), ears(otic), or mouth
suppositories: insertion into a body cavity (vagina, rectum, urethra) and dissolve at body temperature.