WE CLAIM:
1. A tableted pharmaceutical composition comprising nalfurafme or a
pharmaceutically acceptable acid addition salt thereof; a binder component selected
from the group consisting of maltose, maltitol, dextrin and pullulan; and a carrier,
wherein said nalfurafme or a pharmaceutically acceptable acid addition salt thereof is contained in an amount of 0.1 to 10 jig, and
the weight of said binder component is 100,000 to 2,000,000 weight % based on the weight of said nalfurafme or a pharmaceutically acceptable acid addition salt thereof and 5 to 20 weight % based on the total weight of the resulting pharmaceutical composition.
2. A tableted pharmaceutical composition comprising nalfurafme or a
pharmaceutically acceptable acid addition salt thereof; a binder component
containing hydroxypropyl cellulose whose 2% aqueous solution has a viscosity of
greater than 5.9 mPas at 20°C; and a carrier,
wherein said nalfurafme or a pharmaceutically acceptable acid addition salt thereof is contained in an amount of 0.1 to 10 jig, and
the weight of said binder component is 20,000 to 500,000 weight % based on the weight of said nalfurafme or a pharmaceutically acceptable acid addition salt thereof and 1 to 5 weight % based on the total weight of the resulting pharmaceutical composition.
3. The pharmaceutical composition according to claim 1, wherein the weight of said binder component is 100,000 to 400,000 weight % based on the weight of said nalfurafme or a pharmaceutically acceptable acid addition salt thereof.
4. The pharmaceutical composition according to claim 2, wherein the weight of said binder component is 20,000 to 100,000 weight % based on the weight of said nalfurafme or a pharmaceutically acceptable acid addition salt thereof.

5. The pharmaceutical composition according to any one of claims 1 to 4, wherein said nalfurafme or a pharmaceutically acceptable acid addition salt thereof is contained in an amount of 1 to 5 ug.
6. The pharmaceutical composition according to any one of claims 1 to 5, wherein said carrier is selected from the group consisting of mannitol, glucose, anhydrous crystalline fructose, lactose and maltitol.
7. A tablet composed of the pharmaceutical composition according to any one of claims 1 to 6.