Syringe comprising a barrel, a plunger moveably arranged within said barrel and a plunger rod for driving said plunger, wherein the plunger rod is arranged to be pushed by a user, the syringe further comprising: a finger grip at an upper end of said barrel, a first engagement member having a substantially circular shape, said first engagement member comprising a grooved surface; and a second engagement member comprising a movable flexible structure arranged at the finger grip at the barrel, the movable flexible structure being arranged to engage with said grooved surface of the first engagement member such that at least one of an audible and a tactile feedback is given to a user as the plunger rod is moved relative to the barrel for driving said plunger, wherein the movable flexible structure of the second engagement member comprises a first end and a second end, the first end being adapted to engage with the grooved surface of the first engagement member and the second end being fixed to the finger grip; characterized in that said first engagement member is arranged at the plunger rod such that a longitudinal movement of the plunger rod yields a rotational movement of said first engagement member, wherein the movable flexible structure moves relative to the grooved surface to generate said feedback, and for a given distance D travelled by the plunger rod relative to the barrel, a point of the grooved surface of the first engagement member moves a distance d, wherein d>D, wherein said plunger rod comprises at least one of a helical groove and a helical protrusion, and wherein said first engagement member comprises means for engaging said at least one of a helical groove and a helical protrusion. a barrel, a plunger moveably arranged within said barrel and a plunger rod for driving said plunger, wherein the plunger rod is arranged to be pushed by a user, the syringe further comprising: a finger grip at an upper end of said barrel, a first engagement member having a substantially circular shape, said first engagement member comprising a grooved surface; and a second engagement member comprising a movable flexible structure arranged at the finger grip at the barrel, the movable flexible structure being arranged to engage with said grooved surface of the first engagement member such that at least one of an audible and a tactile feedback is given to a user as the plunger rod is moved relative to the barrel for driving said plunger, wherein the movable flexible structure of the second engagement member comprises a first end and a second end, the first end being adapted to engage with the grooved surface of the first engagement member and the second end being fixed to the finger grip; a finger grip at an upper end of said barrel, a first engagement member having a substantially circular shape, said first engagement member comprising a grooved surface; and a second engagement member comprising a movable flexible structure arranged at the finger grip at the barrel, the movable flexible structure being arranged to engage with said grooved surface of the first engagement member such that at least one of an audible and a tactile feedback is given to a user as the plunger rod is moved relative to the barrel for driving said plunger, wherein the movable flexible structure of the second engagement member comprises a first end and a second end, the first end being adapted to engage with the grooved surface of the first engagement member and the second end being fixed to the finger grip; characterized in that said first engagement member is arranged at the plunger rod such that a longitudinal movement of the plunger rod yields a rotational movement of said first engagement member, wherein the movable flexible structure moves relative to the grooved surface to generate said feedback, and for a given distance D travelled by the plunger rod relative to the barrel, a point of the grooved surface of the first engagement member moves a distance d, wherein d>D, wherein said plunger rod comprises at least one of a helical groove and a helical protrusion, and wherein said first engagement member comprises means for engaging said at least one of a helical groove and a helical protrusion.