An hypodermic (or auto-injector) could be a medical device designed to deliver a dose of a specific drug. The injectors were ab initio designed to beat the hesitation related to self-administration of the needle-based drug delivery device. Most autoinjectors ar one-use, disposable, elastic device syringes. Epithelial duct routes of drug administration ar usually chosen to optimize actual dose of drug delivered, assure high bioavailability, bypass first-pass metabolism or harsh epithelial duct environments, still as maximize the speed of onset. Contractile organ (IM) delivery may be most well-liked to endovenous delivery once initiating endovenous access is tough or not possible. Medication may be injected intramuscularly employing a syringe or an automatic delivery device (autoinjector). This information can be published in our peer reviewed journal with impact factors and are calculated using citations not only from research articles but also review articles (which tend to receive more citations), editorials, letters, meeting abstracts, short communications, and case reports. The inclusion of these publications provides the opportunity for editors and publishers to manipulate the ratio used to calculate the impact factor and try to increase their number rapidly. Impact factor plays a major role for the particular journal. Journal with higher impact factor is considered to be more important than other ones.