According to a first aspect of the invention a syringe comprisinga barrel, a plunger moveably arranged within said barrel and a plunger rod for driving said plunger is provided. The syringe comprises a first engagement member arranged at the plunger rod, said first engagement member comprising a grooved surface and a second engagement member arranged at the barrel to engage with said grooved surface of the first engagement member such that feedback is given to a user as the plunger rod is moved relative to the barrel for driving said plunger. Wherein, for a given distance D travelled by the plunger rod relative the barrel, the first engagement member moves a distance d, wherein d‰¥D.
