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.
Be aware that the amount of caffeine in your cup of coffee will vary depending on the type of coffee and how it's brewed. The coffee at a restaurant or coffee shop, for example, can range from about 100 mg for a small (8-ounce) cup to over 400 mg for a large (16-ounce) cup, depending on the brand and the brew.