add the component of mobility to the machine. These robots can replace the delivery person, pneumatic tube system, or other methods of delivering medications. Medications can be loaded into the robot, which is able to navigate the hospital corridors and elevators and deliver the medications to the nursing care areas. Nursing personnel can load returned medications and solutions into the robot, and these returns can be transported back to the pharmacy. The distribution robot is able to call elevators using infrared technology and use sensors and internally stored maps to navigate to the desired destination. Sensors can also detect human or other obstructions, helping the robot to avoid collisions.