Otolaryngologists and ENT physicians are the same. ENT=Ears, Nose, and Throat - Oto=ear, laryng=throat (the nose, or rhino, was dropped some years ago). Otolaryngologists go through 1 year of general surgery training and an additional 4-5 years of specialty head and neck surgery.
But many popular brands actually contain considerably less than an old-fashioned cup of black coffee. An 8.4-ounce serving of Red Bull, for instance, has a relatively modest 76 to 80 mg of caffeine, compared to the 95 to 200 mg in a typical cup of coffee, the Mayo Clinic reports.
A 6-ounce cup of regular coffee contains between 75-150 milligrams of caffeine, according to Johns Hopkins researchers. Instant coffee has less, an average of about 70 milligrams, while an espresso contains about 40 milligrams. Six ounces of brewed tea has about 30 to 90 milligrams of caffeine. A 12-ounce cola may have 30 to 60 milligrams. An 8.4-ounce can of Red Bull Energy Drink boasts 80 milligrams.