WE CLAIM :
1. A pharmaceutical composition comprising:
a) Liraglutide as active drug substance;
b) buffer selected from the group consisting of Sodium citrate, arginine, disodium hydrogen phosphate, glycine or any combination thereof;
c) a tonicity modifier selected from glycerol, mannitol, propylene glycol, xylitol and trehalose;
d) a preservative selected from phenol, cresol, resorcinol, methyl paraben, propyl paraben or any combination thereof.
2. The pharmaceutical composition of claim 1, wherein buffer is disodium hydrogen phosphate.
3. The pharmaceutical composition of claim 1, wherein buffer is sodium citrate.
4. The pharmaceutical composition of claim 1, wherein buffer is arginine.
5. The pharmaceutical composition of claim 1, wherein buffer is glycine.
6. The pharmaceutical composition of claim 1, wherein tonicity modifier is propylene glycol.
7. The pharmaceutical composition of claim 1, wherein tonicity modifier is glycerol.
8. The pharmaceutical composition of claim 1, wherein tonicity modifier is mannitol.
9. The pharmaceutical composition of claim 1, wherein tonicity modifier is selected from trehalose.
10. The pharmaceutical composition of claim 1, wherein tonicity modifier is xylitol.
11. The pharmaceutical composition according to claim 1, characterized in that, pH is maintained from 7.0-8.5.
12. A process for the preparation of the pharmaceutical composition of claim 1, wherein the process comprises:
a) dissolving a buffer selected from the group consisting of Sodium citrate, arginine, disodium hydrogen phosphate, glycine or any combination thereof; a tonicity modifier selected from propylene glycol, glycerol, mannitol, trehalose and mannitol; and a preservative; in water
(b) adding liraglutide to the solution of step (a), mixing it to dissolve.
(c) adjusting pH of the solution of step (b) to a pH of from about 7.0-8.5.