The present invention relates to a composition comprising particles, wherein said particles comprise Poly(lactide-co-glycolide) polymer, therapeutically effective amount of liraglutide or a pharmaceutically acceptable salt thereof and a hydrophilic particle size modulating agent, wherein, the composition is free of added divalent metal ions. The composition provides effective blood glucose control for about 7 days when administered as once a week formulation to a period of about 30 days after single administration of a monthly dose to a patient in need thereof.
