How long can you keep Prednisone liquid on the shelf?

Prednisone in pill form as shipped from the drug company should have a shlef life of at least 2 - 3 years to account for shipping, storage and sales time. Often pharmacies use a one year expiration date which is not the actual date from the drug company. They are trying to be safe and account for poor storage, containers left in hot cars etc., and potentially for increased sales. If stored properly, ie not in sunlight or a humid area, 2 years from prescription date should be just fine.