Caffeine citrate is a prescription medication, not a dietary supplement. The drug combines caffeine with citric acid for better solubility. Doctors give it intravenously or orally in a hospital.
Its main use is to treat apnea of prematurity in newborns, and it requires medical supervision. Unlike the caffeine forms adults use for alertness, this salt is designed to stimulate breathing in premature infants. It is not sold for energy or focus.