The whole Tritter arc brought up a bunch of them. My favorite was when the doc at the clinic offered to prescribe him Tylenol #3 and then said he couldn't prescribe Vicodin because it was a narcotic. . . wtf? Their defense of House's "addiction" and the process of addiction and pain management was weak and it would seem like if I know it's weak, a hospital full of doctors would also realize that. Overall, I think they don't handle the explanation of pain management very well.
However my biggest qualm is that he's a doctor and he knows better than to take that much Tylenol. His "addiction" to pain medications is often mentioned, the fact that his liver is probably destroyed right now is rarely talked about (although, I did notice he mentioned it in the latest episode). They seem to be more concerned with his "mental state" which, if he was really in pain is less of an issue with something like vicodin than his liver function. They should have given him another drug of choice, but I guess vicodin is easier to get in real life than schedule 2 narcotics. In truth, and I've seen this, if he took that much vicodin, he'd be have external symptoms of liver disease most likely.
It's little things. Every episode I'm like "That's crazy wrong." On the other hand, there's lots of "real life" medical inaccuracies that just have to be thrown aside for the glory of television. For example, I've seen people with tapeworms. Never once have I seen a surgeon cut them open and extract it on the table. Why the heck would you? Wouldn't it be better to give them a medication that would kill it and be done with it? Who cares if she has CIPA. She can still get surgical complications and infections and everything. There's also the surgeons legal liability when you slice someone's GI tract open right there on the table and pull out a 30 foot worm. On the other hand, saying, "Looks like you have a tapeworm! You should probably take this pill" is a lot less dramatic.
They also make the pharmacist look like a complete and total tool every time they show him. Pharmacists aren't morons, man! He's always the bumbling idiot in every scene he's in, heh.