Abstract
Upper respiratory infection (URI) is a common causative disease of olfactory loss. Although a method for the treatment for olfactory loss after URI has not been established, corticosteroid has usually been used for patients in Japan. A steroid drop method has been widely used as a means of steroid administration, or corticosteroid has been orally administered. The steroid nasal drop method has the advantage of requiring only a small amount of steroids. In this method, patients must let their head lean back. This position is not be comfortable for patients, it is quite difficult to direct the steroid solution to the olfactory cleft and patients must administer the drops themselves every day. So, the steroid dose depends on the patient and is imprecise. On the other hand, when steroids are administered orally, the patients are guaranteed a steroid effect. But patients must take a relatively high dose and it can be problematic for patients with a gastric ulcer or another complications. Therefore, we have introduced a new method—local injection of steroids (Fukazawa et al., 1999).
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