whtsthfrequency
Posted : 2/22/2008 1:18:00 AM
The difference between dexamethasone and prednisone is the amount of glucocortoid relative to mineralcortoid activity. Dexamethasone is longer-acting and has much more glucocortoid activity compared to mineralcortoid. Prednisone does not last as long, and still has more gluco than mineral activity, but not to the extent of dex. Mineralcortoid effects are mostly related to water retention/edema, glucocortoid effects are all of the usual "steroid" effects.
They are basically the same class of drugs, however, and in studies there has been no advantage of one over the other in terms "how well they work solving the problem". It is more a matter of what side effects the dog is prone to showing - e.g. if they swell up immediately, best to chose something with lower mineralcortoid activity.
Have you tried a combination of oral antihistamines and fatty acid supplementation? That's what is usually tried before steroids, but after basic treatment like avoiding allergens, treating the skin directly, etc.