Abstract: A medicament for treating allergic rhinitis, characterized in that (A) a compound represented by the formula (I) or a pharmaceutically acceptable salt thereof, is combined with (B) at least one compound selected from the group consisting of cetirizine, fexofenadine, and loratadine, or a pharmaceutically acceptable salt thereof. Since the effects of the medicament for treating allergic rhinitis of the present invention surpass the sum of the effects of single dose of each of the agents against the allergic rhinitis, the medicament is useful as a medicament for treating allergic rhinitis having potent effects.

Abstract: The present invention provides a selective suppressor of the IgE production comprising a compound which suppresses the IgE production in a process from a differentiation of a mature B cell into an antibody-producing cell to the production of an antibody and which does not suppress or weakly suppresses the production of IgG, IgM and/or IgA which are produced at the same time, a compound of the formula (I): wherein R1–R13 are hydrogen, halogen, lower alkyl, lower alkoxy or the like, X is —O—, —CH2—, —NR14— or —S(O)p- and Y is lower alkyl, lower alkenyl or the like, a process for producing the same and a pharmaceutical composition comprising the same.

Abstract: An inhibitor for an inflammatory cell infiltration in the respiratory tract, an inhibitor for hyperirritability in the respiratory tract, a muciparous inhibitor, or a bronchodilator which contains as an active ingredient a compound represented by the formula (I) or (II): wherein R1 is the group represented by the formula: —C(=Z)-W—R4 wherein Z is an oxygen atom or the like; W is an oxygen atom or the like; R4 is optionally substituted alkyl or the like; R2 and R3 are independently optionally substituted alkyl or the like; or R2 and R3 are taken together to form optionally substituted alkylene which may contain a heteroatom(s); m is an integer of 0 to 2; A is optionally substituted aryl or optionally substituted heteroaryl; wherein R5 is the group represented by the formula: —Y1—Y2—Y3—Ra wherein Y1 and Y3 are each independently a bond or the like; Y2 is —C(?O)—NRb— or the like; Ra is optionally substituted alkyl, or the like; Rb is a hydrogen atom or the like; R6 is a hydrogen atom or the like;

Abstract: The present invention provides novel compounds having a dual antagonistic activity against thromboxane A2 receptor and prostaglandin D2 receptor and pharmaceutical compositions comprising them. A compound of the formula (I): wherein R1 is —CH2—CH?CH—CH2—CH2—CH2—COOR2 or —CH?CH—CH2—CH2—CH2—COOR2; R2 is hydrogen or alkyl; m is 0 or 1; p is 0 or 1; X1 and X3 each is independently optionally substituted aryl or optionally substituted heteroaryl; X2 is a bond, —CH2—, —S—, —SO2—, —CH2—O—, —O—CH2—, —CH2—S—, —S—CH2—, or the like; X4 is —CH2—, —CH2—CH2—, —C(?O)—, or the like, have a dual antagonistic activity against both a thromboxane A2 receptor and a prostaglandin D2 receptor.

Abstract: The present invention provides a selective suppressor of the IgE production comprising a compound which suppresses the IgE production in a process from a differentiation of a mature B cell into an antibody-producing cell to the production of an antibody and which does not suppress or weakly suppresses the production of IgG, IgM and/or IgA which are produced at the same time, a compound of the formula (I): wherein R1–R13 are hydrogen, halogen, lower alkyl, lower alkoxy or the like, X is —O—, CH2—, —NR14— or —S(O)p— and Y is lower alkyl, lower alkenyl or the like, a process for producing the same and a pharmaceutical composition comprising the same.

Abstract: A compound of the formula (I): wherein A is alkylene optionally having an unsaturated bond; R is —C(?O)—R1; R1 is hydroxy or the like; m is 0 or 1; p is 0 or 1; X1 and X3 are each independently optionally substituted aryl or optionally substituted heteroaryl or the like; X2 is a bond, —CH2—, —S—, —SO2—, —CH2—O—, —O—CH2—, —CH2—S—, —S—CH2—, or the like; X4 is —CH2—, —CH2—CH2—, —C(?O)—, or the like, having a dual antagonistic activity against both a thromboxane A2 receptor and a prostaglandin D2 receptor is found.

Abstract: The present invention provides a selective suppressor of the IgE production comprising a compound which suppresses the IgE production in a process from a differentiation of a mature B cell into an antibody-producing cell to the production of an antibody and which does not suppress or weakly suppresses the production of IgG, IgM and/or IgA which are produced at the same time, a compound of the formula (I): wherein R1–R13 are hydrogen, halogen, lower alkyl, lower alkoxy or the like, X is —O—, —CH2—, NR14— or —S(O)p— and Y is lower alkyl, lower alkenyl or the like, a process for producing the same and a pharmaceutical composition comprising the same.

Abstract: The present invention provides a pharmaceutical composition for use as a Th2 differentiation inhibitor comprising a compound represented by Formula (I): wherein each of ring A, ring B and ring C is an aromatic carbocyclic ring, a heterocyclic ring and the like, X is a single bond, —O—, —CH2—, —NH—, —SO— and the like, Y is hydrogen, optionally substituted lower alkyl, optionally substituted lower alkenyl and the like, each of V1 and V2 is a single bond, —O—, —NH—, —OCH2— and the like, a prodrug, pharmaceutically acceptable salt or solvate thereof.

Abstract: The present invention provides a selective suppressor of the IgE production comprising a compound which suppresses the IgE production in a process from a differentiation of a mature B cell into an antibody-producing cell to the production of an antibody and which does not suppress or weakly suppresses the production of IgG, IgM and/or IgA which are produced at the same time, a compound of the formula (I): 1

Abstract: A compound of the formula (I): 1

Abstract: A PGD2 receptor antagonist such as a compound of the formula (IA-a-5): 1

Abstract: A PGD2 receptor antagonist such as a compound of the formula (IA-a-5): a pharmaceutical acceptable salt thereof or a hydrate thereof, has an efficacious activity for the prevention or treatment of itching and is useful as a medicament.

Abstract: A compound of the formula (I): wherein for example, a compound below: wherein R1 is CH3, H or Na; and X1—X2—X3 is or its salt or a hydrate thereof is useful as PGD2 antagonist and can be used as a drug for treating diseases in which mast cell dysfunction is involved, for example, systemic mastocytosis and disorder of systemic mast cell activation, and also tracheal contraction, asthma, allergic rhinitis, allergic conjunctivitis, urticaria, injury due to ischemic reperfusion, and as an anti-inflammatory agent. It is particularly useful in the treatment of nasal occlusion.

Abstract: A PGD2 receptor antagonist such as a compound of the formula (IA-a-5): 1

Abstract: A compound of the formula (I): wherein: for example, a compound below: wherein: R1 is CH3, H or Na; and X1—X2—X3 is: or its salt or a hydrate thereof is useful as PGD2 antagonist and can be used as a drug for treating diseases in which mast cell dysfunction is involved, for example, systemic mastocytosis and disorder of systemic mast cell activation, and also tracheal contraction, asthma, allergic rhinitis, allergic conjunctivitis, urticaria, injury due to ischemic reperfusion, and as an anti-inflammatory agent. It is particularly useful in the treatment of nasal occlusion.

Abstract: A compound of the formula (I): wherein for example, a compound below: wherein R1 is CH3, H or Na; and X1-X2-X3 is or its salt or a hydrate thereof is useful as PGD2 antagonist and can be used as a drug for treating diseases in which mast cell dysfunction is involved, for example, systemic mastocytosis and disorder of systemic mast cell activation, and also tracheal contraction, asthma, allergic rhinitis, allergic conjunctivitis, urticaria, injury due to ischemic reperfusion, and as an anti-inflammatory agent. It is particularly useful in the treatment of nasal occlusion.

Abstract: A compound, a pharmaceutically acceptable salt thereof, or a hydrate thereof having PGD.sub.

Abstract: A compound, pharmaceutically acceptable salt thereof, or hydrate thereof having a PGD.sub.2 -antagonistic activity, and an inhibitory activity against infiltration of eosinophils, useful for treating mast cell dysfunction-associated diseases, such as systemic mastocytosis and disorder of systemic mast cell activation, as well as tracheal contraction, asthma, allergic rhinitis, allergic conjunctivitis, urticaria, ischemic reperfusion injury, inflammation and atopic dermatitis, which is shown by the formula (I): ##STR1## is provided.