Injections are widely-used in every medical field. Doctors are using injections for ages because this is the perfect way to give treatments to patients. It has also seen that there are many people who prevent injections because of pain and pain they feel while using it. For people who fear injections, science has conceived needle free gadget that can be used without experience pain. Old injection therapy are now replaced by hook free injections and today every doctor is using it in their remedies. These injections are in use of many medical doctors for their treatments in fact it is a great advancement within medical field.