Chicago residents have a new way of curing a hangover or flu: getting an IV. Since its grand opening in the Windy City on Dec. 15, revive, a “hydration clinic” staffed by surgeon Dr. Jack Dybis, D.O., and emergency room nurses, provides intravenous (IV) fluids to help healthy people recover from mild to moderate dehydration. While that might seem like a limited clientele, Dybis says quite a few of us are actually at risk of getting dehydrated: people with hangovers, those sniffling through severe colds and flu, elite athletes, and globe-trotting travelers worn out by jet lag. And revive isn’t the only outlet ready to serve your hydrating needs. Commercial IV treatment facilities resembling spas, including Revivme, run by board-certified ER physicians in Miami‘s South Beach, and Hangover Heaven in Las Vegas, which doles out IV and non-IV relief from a bus and is run by a board-certified anesthesiologist, are also gaining customers. But experts question whether people should pay for IV treatments, which have risks and may not be more effective than less expensive home remedies. (MORE: Want to Cure a Hangover? Don’t Pick Up a Cigarette) So how do you know if you’re a candidate for a drip? Potential customers at revive fill out a medical history and mention any past surgeries or preexisting conditions. In Dybis’s office, they describe their current symptoms, which typically include headache, dry mouth, nausea, vomiting, and inability to sleep, and answer questions about how much water they drink a day and how often they urinate. (They may also be asked to describe the color of their urine, since darker fluid is a sign of dehydration.) Then a nurse may start a line: cold and flu sufferers get hooked up to an IV that contains a Lactated Ringer’s solution, which contains a basic recipe of essential nutrients such as potassium and sodium, along with vitamin C and vitamin B complex, which, Dybis claims, provides an “energy boost.” Hangover sufferers get the same treatment, plus doses of Toradol (ketorolac), essentially a super ibuprofen, and Zofran