| abstract |
A histamine H3-receptor antagonist; and a therapeutic and/or preventive agent for metabolic diseases, e.g., obesity and diabetes, various diseases such as, e.g., angina pectoris and acute/congestive heart failure, circulatory diseases such as, e.g., idiopathic narcolepsy and recurrent narcolepsy, and central and peripheral nerve diseases such as, e.g., bulimia, affective disorders, and depression. The histamine H3-receptor antagonist is characterized by containing a piperidine derivative represented by the general formula (I) [wherein X1 and X2 each independently represents nitrogen or CH; Y represents a specific group; X3 represents Os-(CH2)m; R1 and R2 each independently represents hydrogen, halogeno, linear or branched lower alkyl, lower alkoxy, or acetyl substituted by 2 or 3 fluorine atoms; s is 0 or 1; and m is such an integer that (m+s) is 0 to 4] or a pharmaceutically acceptable salt of the derivative. |