Unless this spray does something super-amazing that's not yet been reported, I predict that GSK's Allermist allergy brand (which regulators apparently want to see renamed for the US) will not be too much of a threat to the dominance of Schering-Plough's Claritin brands. Why? Anyone with hay fever will tell you: sticking something up your nose, no matter how effective, is just plain weird. It leaves your nose dripping and then you're afraid to blow it in case you blow out the drug that you just snorted in there. Plus you can feel it dripping down the back of your throat. Bottom line: as long as there are effective, side-effect-free pills like Claritin and its generics, hay fever sufferers won' be switching to nasal sprays anytime soon.

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