申请人:Wakiyama Naoki
公开号:US20070142442A1
公开(公告)日:2007-06-21
The present invention provides a pharmaceutical composition containing a calcium channel blocker of the following formula or a pharmacologically acceptable salt thereof and a pharmacologically acceptable alkaline material which is added to an extent such that an aqueous solution or dispersion solution of said pharmaceutical composition containing a calcium channel blocker has a pH of at least 8:
[wherein R
1
represents an optionally substituted C
1
-C
4
alkyl group, an amino group or a cyano group; R
2
represents an optionally substituted C
1
-C
4
alkyl group, a substituted C
3
-C
4
alkenyl group, or a substituted 4- to 6-membered cyclic amino group; R
3
represents a substituted phenyl group; R
4
represents an optionally substituted C
1
-C
4
alkoxycarbonyl group, a 1,3,2-phosphorinan-2-yl group, or a 5,5-dimethyl-1,3,2-phosphorinan-2-yl group, R
5
represents a C
1
-C
4
alkyl group].