| abstract |
The invention relates to an inducible nitric oxide synthase inhibitor, preferably of the formula (I) (The definition of each symbol is as described in the specification.) And a therapeutic and / or prophylactic agent for allergic diseases, characterized by comprising a condensed piperidine compound, an acid addition salt thereof, or a hydrate thereof as an active ingredient. The therapeutic agent for an allergic disease of the present invention containing an inducible nitric oxide synthase inhibitor as an active ingredient is effective in treating an allergic disease at a low dose. |