If researchers can learn to control distribution of bodily fluids in space, they can, in time, do so on Earth. An enhanced understanding of the entire cardiovascular system could result. Some already have. One NASA spinoff comes from work on the motion sickness astronauts experience. Drug injections are impractical, since the medications may froth under weightlessness.
Vomiting can make the use of oral medications also unworkable.
Drug administration through a patch placed on the skin provided the answer for space voyages. Wireless telemetry NASA developed to communicate with its space vehicles in orbit now monitors patients in hospital coronary care units. Programmable implantable medication systems designed for astronauts later went into clinical trials, and companies are investigating such a pump to deliver precise, preprogrammed concentrations of insulin to diabetics over a long period. The work goes on. One important field is bioproducts bioprocessing, or use of the microgravity environment to form and manipulate biological materials.