Made me laugh when the reporter said that patients get 50-100mcg of Fentanyl prior to surgery. As if the drug was so strong, that it was all they needed to get them through, lol. Maybe in some cases, (that would be a good start) but others get more, in addition to Midazolam(Versed) or Lorazepam(Ativan). Depends on the situation and person in which they are administering the drug. They will typically get even more Fentanyl during surgery, and its common to administer another 200mcg (2mL) of Fentanyl after surgery. In many, many, many instances, where that still wasn't enough, PACU nurses will on to administer Morphine, Dilaudid and even Ketamine in rare cases.
However, we all know that reporters have to sensationalize the story as much as possible to make the amount he was caught with seem like enough to kill the nation if it got out, lol. Don't get me wrong, 3/4 of a gallon is a shit-ton of Fentanyl, and I'm not saying what this guy did was okay, but I hate how the news skews things to pump their story. Obviously Fentanyl is dangerous, due to its effects on the respiratory system (respiratory depression), but this reporter was wrong about the doses she reported.