In computer technology, computer devices are susceptible to EMI because electromagnetic fields are a byproduct of passing electricity through a wire. Data lines that have not been properly shielded are susceptible to data corruption by EMI.
Quinine has been used for the treatment of malaria and associated febrile states, leg cramps caused by vascular spasm, internal hemorrhoids, varicose veins, and pleural cavities after thoracoplasty.
Some people are so susceptible to serious side effects from quinine that they must avoid even the small amount in tonic water. For them, quinine may cause life-threatening heart rhythm disturbances, severe skin reactions and several blood-related complications.