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.
Traditional coffee contains more caffeine than instant. The caffeine content of an average 5 ounce cup of brewed coffee can vary from 50 to 120mg. (an 8 ounce cup has between 80mg and 135mg). Espresso contains about 100mg of caffeine per 2 ounce cup. An average cup of espresso has about 2 to 3 times as much caffeine as an average cup of instant coffee. An average 5 ounce cup of black tea contains about 30-60mg. Instant tea contains about 12 - 28mg caffeine.