The Microfluidic Drug DosageDetection Development (M4D) experiment aims to understand better how liquids behave in "lab on a chip" microfluidics devices in space. The overall goal is to eventually design and manufacture microfluidic devices that can analyze drug stability and quality on long-duration and deep space missions. The experiment will inject liquidi nto the microfluidic device and analyze fluid flow characteristics. Additionally, the study will examine the impact of spaceflight and radiation exposure on a commonly used drug (Tylenol).