Autoinjectors or auto-injector is a medical device, which is used to deliver a particular dosage of a drug. These devices are easy-to-handle & cost-effective and can be used by patients, caregivers, and even untrained personnel to deliver drugs of definite dosage. Autoinjectors are used for several applications, namely, rheumatoid arthritis, multiple sclerosis, diabetes, anaphylaxis, and other therapies. These devices offer multiple advantages over its conventional counterparts, namely accuracy, better efficacy, lower probability of needle-stick injuries, consistent dosage delivery, simplicity and safety among others.