Pharmaceutical composition containing 8-[(3R)-3-amino-1-piperidinyl]-7-(2-butyn-1-yl)-3,7-dihydro-3-methyl-1-[4-methyl-2-quinazolinyl)methyl]-1H-purine-2,6-dione or a pharmaceutically acceptable salt thereof

1. Pharmaceutical composition which is a tablet and has a tablet hardness in the range of from 60 to 120 N comprising linagliptin or a pharmaceutically acceptable salt thereof as active ingredient, wherein the pharmaceutical composition does not comprise a binder selected from the group consisting of lactose, povidone, copovidone, hydroxypropyl methylcellulose, hydroxypropylcellulose, pre-gelatinized starch, microcrystalline cellulose, polyethylene glycol and pullulan, and wherein the pharmaceutical composition is obtained by direct compression; wherein anhydrous calcium hydrogen phosphate is the only diluent present in the composition or wherein the diluent is a combination of anhydrous calcium hydrogen phosphate and mannitol.

2. Pharmaceutical composition according to claim 1 comprising additionally one or more excipients selected from diluents, disintegrants and lubricants.

3. Pharmaceutical composition according to claim 2 , wherein the one or more excipients comprise diluents, wherein the diluents comprise anhydrous calcium hydrogen phosphate.

4. Pharmaceutical composition according to claim 1 , wherein anhydrous calcium hydrogen phosphate and mannitol are the only diluents present in the composition.

5. Pharmaceutical composition according to claim 2 , wherein the one or more excipients comprise lubricants, wherein the lubricants are selected from magnesium stearate, talc, stearic acid, calcium behenate, calcium stearate and sodium stearyl fumarate.

6. Pharmaceutical composition according to claim 2 , wherein the one or more excipients comprise disintegrants, wherein the disintegrants are selected from starch, crospovidone, sodium starch glycolate and croscarmellose sodium.

7. Pharmaceutical composition according to claim 1 , wherein the pharmaceutical composition does not comprise a binder and does not comprise a disintegrant and wherein the pharmaceutical composition is obtained by direct compression.

8. Pharmaceutical composition according to claim 1 , which is in the form of a tablet, a coated tablet, an effervescent tablet, an orally disintegrating tablet, a chewable tablet or a capsule filled with minitablets.

9. Pharmaceutical composition according to claim 8 , wherein the coating of the coated tablet comprises hydroxypropyl methylcellulose, polyethylene glycol, talc, titanium dioxide, and optionally a colorant.

10. Pharmaceutical composition according to claim 1 , wherein the linagliptin is present as amorphous linagliptin, crystalline linagliptin having polymorphic form A, crystalline linagliptin having polymorphic form B and/or crystalline linagliptin having polymorphic form C.

11. Pharmaceutical composition according to claim 10 , wherein the linagliptin is present as a mixture of crystalline linagliptin having polymorphic form A and crystalline linagliptin having polymorphic form B.

12. Process for preparing a pharmaceutical composition according to claim 1 , comprising:

I) blending linagliptin, or a pharmaceutically acceptable salt thereof, and the excipients, except the lubricant;

II) lubricating the blend using the lubricant;

III) directly compressing the blend;

IV) optionally, applying a coating.

13. Pharmaceutical composition according to claim 1 , wherein the linagliptin is present as amorphous linagliptin, crystalline linagliptin having polymorphic form A, crystalline linagliptin having polymorphic form B and/or crystalline linagliptin having polymorphic form C.

14. Pharmaceutical composition according to claim 4 , wherein the linagliptin is present as amorphous linagliptin, crystalline linagliptin having polymorphic form A, crystalline linagliptin having polymorphic form B and/or crystalline linagliptin having polymorphic form C.

15. Pharmaceutical composition according to claim 7 , wherein the linagliptin is present as amorphous linagliptin, crystalline linagliptin having polymorphic form A, crystalline linagliptin having polymorphic form B and/or crystalline linagliptin having polymorphic form C.

16. Process for preparing a pharmaceutical composition according to claim 4 , comprising:

I) blending linagliptin, or a pharmaceutically acceptable salt thereof, and the excipients, except the lubricant;

II) lubricating the blend using the lubricant;

III) directly compressing the blend;

IV) optionally, applying a coating.

17. Process for preparing a pharmaceutical composition according to claim 7 , comprising:

I) blending linagliptin, or a pharmaceutically acceptable salt thereof, and the excipients, except a lubricant;

II) lubricating the blend using the lubricant;

III) directly compressing the blend;

IV) optionally, applying a coating.