Abstract: To provide an external skin agent that prevents onset of atopic skin inflammations and is low irritant to skin, which is characterized by including: 1) clay modified by a compound having a quaternary amino group; and 2) a polymer or copolymer that has a side chain including a structure similar to a biological component.

Abstract: To provide an external skin agent that prevents onset of atopic skin inflammations and is low irritant to skin, which is characterized by including: 1) clay modified by a compound having a quaternary amino group; and 2) a polymer or copolymer that has a side chain including a structure similar to a biological component.

Abstract: To provide An external skin agent that prevents onset of atopic skin inflammations and is low irritant to skin, which is characterized by including: 1) clay modified by a compound having a quaternary amino group; and 2) a polymer or copolymer that has a side chain including a structure similar to a biological component.

Abstract: To provide An external skin agent that prevents onset of atopic skin inflammations and is low irritant to skin, which is characterized by including: 1) clay modified by a compound having a quaternary amino group; and 2) a polymer or copolymer that has a side chain including a structure similar to a biological component.

Abstract: A method of treating atopy-evoked pruritic symptoms by administering a prostaglandin derivative.

Abstract: To provide An external skin agent that prevents onset of atopic skin inflammations and is low irritant to skin, which is characterized by including: 1) clay modified by a compound having a quaternary amino group; and 2) a polymer or copolymer that has a side chain including a structure similar to a biological component.

Abstract: A pharmaceutical preparation for preventing or treating pruritic symptoms which contains as an effective ingredient a prostaglandin derivative represented by formula [1] wherein X1 and X2 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 (CH2)kA(CH2)hB(CH2)q, (CH2)kA(CH2)rA?(CH2)t (CH2)kB(CH2)hB?(CH2)q or (CH2)k-1B?(CH2)q-1A? 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; W1 is a hydroxyl group, a C1-10 alkyloxy group, a C3-10 cycloalkyloxy group, an aryloxy group or an arylalkyloxy group; W2 is a C1-10 alkyl grou

Abstract: The pharmaceutical preparation of the invention, which comprises a prostaglandin or a pharmaceutically acceptable salt thereof as an effective ingredient, has an antipruritic effect with fewer side effects. It is particularly effective in controlling the itch sensation accompanying atopic symptoms.