This is an actual quote from Principles of Surgery, Seventh Edition
by Schwartz (McGraw-Hill, 1999):
The treatments of hiccups are diverse. Nonpharmacologic hiccup treatments usually rely on some method of nasopharyngeal stimulation; examples include forcible traction of the tongue, gargling or sipping iced water, swallowing a tablespoon of granulated sugar, grape jelly under the tongue, and inhalation of noxious fumes (ammonia). Direct pharyngeal stimulation with a rubber catheter is reportedly successful in 90 percent of cases. Pharmacologic treatments include administering continuous positive-pressure ventilation at 25 to 35 cmH2O, chlorpromazine, haloperidol, phenytoin, phenobarbital, carbamazepine, and sodium valproate. Other agents sporadically reported in the literature include metoclopramide, amitriptyline, chloral hydrate and ketamine.