Auto injector is a medical device intended to deliver fixed doses of certain drugs. As to its name, auto injector automatically inserts the needle and performs the injection. Auto injectors have two types of design fillable or prefilled syringes. In the context of usability, auto injectors are available in disposable and re-usable form. Further, due to its handy nature, auto injectors are appreciated by a number of patients, who need a self injection. Global Auto injectors Market is expected to cross USD 5 Billion by the year 2024.