A pharmaceutical preparation for preventing or treating pruritic symptoms which contains as an effective ingredient a prostaglandin derivative represented by formula [1]
wherein X
1
and X
2
which are different from each other represent a hydrogen atom, a halogen atom or a hydroxyl group;
Y is an ethylene group, a vinylene group or an ethynylene group; Z is the formula
(CH
2
)
k
A(CH
2
)
h
B(CH
2
)
q
,
(CH
2
)
k
A(CH
2
)
r
A′(CH
2
)
t
(CH
2
)
k
B(CH
2
)
h
B′(CH
2
)
q
or
(CH
2
)
k-1
B′(CH
2
)
q-1
A′
wherein k is an integer of 1 to 4, h is an integer of 0 to 4, q is an integer 1 to 4, r is an integer of 0 to 4, and t is an integer of 0 to 2; A and A′ which may be the same or different represent an ethylene group, a vinylene group or an ethynylene group;
B and B′ which may be the same or different represent an oxygen atom or a group represented by the formula S(O)
u
wherein u is an integer of 0 to 2;
W
1
is a hydroxyl group, a C
1-10
alkyloxy group, a C
3-10
cycloalkyloxy group, an aryloxy group or an arylalkyloxy group;
W
2
is a C
1-10
alkyl group, a C
2-10
alkenyl group, a C
2-10
alkynyl group, a C
3-10
cycloalkyl group, a C
1-5
alkyl group substituted by C
3-10
cycloalkyl group(s), or a group represented by the formula
wherein W
4
is a C
1-10
alkyl group, a C
2-10
alkenyl group, a C
2-10
alkynyl group or a C
1-5
alkyl group substituted by C
3-10
cycloalkyl group(s); v is an integer of 0 to 4;
W
3
is a hydrogen atom or a methyl group, or W
3
when taken together with W
2
and the adjacent carbon atom forms a C
3-10
cycloalkyl group; m is 0 or 1, a pharmaceutically acceptable salt thereof or a hydrate thereof.
一种用于预防或治疗瘙痒症状的药物制剂,其有效成分包含由式[1]表示的
前列腺素衍
生物
其中 X
1
和 X
2
代表氢原子、卤素原子或羟基;
Y 是
乙烯基、
乙烯基或
乙炔基; Z 的式子为
(CH
2
)
k
A(CH
2
)
h
B(CH
2
)
q
,
(CH
2
)
k
A(CH
2
)
r
A′(CH
2
)
t
(CH
2
)
k
B(CH
2
)
h
B′(CH
2
)
q
或
(CH
2
)
k-1
B′(CH
2
)
q-1
A′
其中 k 为 1 至 4 的整数,h 为 0 至 4 的整数,q 为 1 至 4 的整数,r 为 0 至 4 的整数,t 为 0 至 2 的整数;A 和 A′可以相同或不同,代表
乙烯基团、
乙烯基团或
乙炔基团;
可以相同或不同的 B 和 B′代表氧原子或由式 S(O) 代表的基团
u
其中 u 为 0 至 2 的整数;
W
1
是羟基、C
1-10
烷氧基、C
3-10
环烷氧基、芳氧基或芳烷氧基;
W
2
是一个 C
1-10
烷基、C
2-10
烯基、C
2-10
炔基、一个 C
3-10
环烷基、一个 C
1-5
烷基、被 C
3-10
被 C 3-10 环烷基取代的 C 1-5 烷基,或由以下式子表示的基团
其中 W
4
是一个 C
1-10
烷基、C
2-10
烯基、C
2-10
炔基或 C
1-5
烷基或被 C
3-10
v 是 0 至 4 的整数;
W
3
是氢原子或甲基,或 W
3
与 W
2
和相邻碳原子形成一个 C
3-10
环烷基;m 为 0 或 1、其药学上可接受的盐或其
水合物。