A pharmaceutical composition which comprises a combination of a triazaspiroÄ5.5Üundecane derivative of the formula (I): CHEM (wherein all the symbols have the same meanings as defined hereinafter), a quaternary ammonium salt thereof, or an N-oxide thereof, or a non-toxic salt thereof with at least one cytochrome P450 isozyme 3A4 inhibitor and/or at least one P-glycoprotein inhibitor. As a result the pharmaceutical composition comprising the above-described combination, bioavailability of the compound of the formula (I) is enhanced and is able to be effectively utilized as an oral agent in the treatment of various diseases.
展开▼
