Pulse v0 is a compact, smart wearable that can deliver medicine automatically and safely. In extreme or confined environments like spacecraft, analog habitats, or remote Earth locations giving yourself a shot is difficult. Gravity doesn’t help, spaces are tight, and even small mistakes like needle jams, backflow, or sensor errors can be dangerous. Medicines such as anti-nausea drugs, painkillers, antibiotics, allergy treatments, or even cancer therapies need precise delivery to keep people safe. Pulse v0 is a bench-top prototype, built to test whether a wearable can reliably and safely deliver medication without putting anyone at risk. It allows us to study fluid dynamics, dosing accuracy, and sensor reliability under controlled lab conditions. The design is human-centered, focusing on safety, usability, and reliability. Testing this prototype now generates critical data to guide future iterations, including wearables for space, remote missions, or emergency use. Beyond space, Pulse v0