The succinylcholine in the syringe

The writers really needed to get some medically knowledgeable folks involved. Succinylcholine is not a sedative, it is a muscle paralytic. You stop breathing. And when you stop breathing for more than a few minutes, you die. This isn't something that someone would just wake up from unless they were only given maybe 2cc and stopped breathing for a minute or two (it has a short half-life).

That really bugged me, because it was so unnecessary to be that wrong and clueless. But then again this whole movie was a huge WTF.