Large volume wearable injectors are devices that are used to deliver high volume of drugs usually in the range of 2 – 10 ml of drug within 2 – 15 minutes. There are many chronic conditions, which require prolonged and continuous drugs delivery and introduction of wearable injectors are one of the achievement in the field of novel drugs delivery systems. Many global pharmaceutical companies are developing biologic therapeutics, which are basically rooted onto monoclonal antibodies for the treatment of autoimmune disorders and immuno-oncology drugs. With the busy lifestyle there is a low possibility of regular intake of drugs through injections, typically weekly, biweekly or monthly by people suffering from various chronic conditions that require constant medication. Wearable injectors offer the perfect solution in terms of portability and precise dosage administration.