Prefillable intradermal injector

A method of administering an intradermal injection through a needle cannula from a prefillable intradermal injector having a substance stored in a reservoir in fluid communication with a needle cannula defining an axis, comprising the steps of:

• providing a limiter slideably disposed on said reservoir and having a generally flat skin engaging surface extending in a plane generally perpendicular to said axis of said needle cannula having a forward tip located within said limiter;
• moving said limiter in a first direction relative to said reservoir to expose said forward tip, wherein said limiter limits penetration of the forward tip of said needle cannula into the dermis layer of the skin;
• expelling the substance from said reservoir through said needle cannula into the skin of an animal;
• and
• moving said limiter in a second direction relative to said reservoir to enclose said forward tip inside said limiter.

A prefillable intradermal injector, comprising:

• a reservoir prefillable with a substance having a generally closed proximal end and an open distal end;
• a needle cannula having a distal end in fluid communication with said substance in said reservoir extending through said proximal end and an exposed forward tip;
• a stopper slideably received in said open distal end of said reservoir moveable in said reservoir to expel said substance through said forward tip of said needle cannula;
• and
• a limiter having a distal end slideably supported around said reservoir and moveable relative to said reservoir and a generally closed proximal end including a flat skin engaging surface having an opening therethrough receiving said forward tip of said needle cannula therethrough as said limiter moves relative to said reservoir and said limiter limiting extension of said forward tip of said needle cannula beyond said skin engaging surface a distance of more than 3.0 mm.