The present invention discloses a syringe 100. The syringe 100 comprises a barrel 102 with a needle 101 arranged at a distal end 1 10 of the barrel 102. The barrel 102 is adapted to contain a drug and the barrel 102 has a tubular wall extending proximaily from the distal end 110. The barrel 102 extends along an axis 1000. The syringe 100 further comprises a plunger stopper 103 disposed within the barrel 102, wherem the plunger stopper 103 is adapted to be in fluid-tight engagement with the tubular wall of the barrel 102. The plunger stopper 103 has a thread profile 105b. The syringe 100 also comprises a plunger rod 104 extending along the axis 1000, wherem said plunger rod 104 has a thread profile 105a that engaging with the thread profile 105b of the plunger stopper 103. The engaged plunger stopper 103 and plunger rod 104 are being displaceable along the axis 1000 within the barrel 102. The engagement of the thread profiles 105a, 105b is configured such that the axial separation force B between the plunger stopper 103 and the plunger rod 104 in a proximal directing is being less than a liquid suction force A through the needle 101.