Thorazine (generic name: chlorpromazine) is an anti-psychotic drug often used in the treatment of schizophrenia, manic bipolar disorder, and other psychoses. Thorazine has a sedative effect on patients for whom it is prescribed, and has a range of side effects including dry mouth, slurred speech, photo-sensitivity, memory loss, and seizures.
Desflurane is a general surgical anesthetic. Although liquid at room temperature, it rapidly vaporizes when heated.
After Ian punches the limo driver and steals his uniform, the driver is not seen either by the camera or Ian's son, who enters the car after Ian knocks him out. Unless Ian took the time to move the body (unlikely given how many people were in the vicinity), the son would have found the driver and probably refused to enter the car.
The Mercedes that Ian steals with to pick up Alex has different license plates on the front and back.
It's unlikely desflurane would be available from an unrefrigerated automatic medication dispensation unit. Its only viable application is as an anesthetic, which is rarely used in psychiatric units, and it requires refrigeration.
When Root shoots Hersh, he has only partially emerged from around the corner leading into the hall where she is and yet by the time he is laying on the ground, he is ten feet or so closer to her, and it is not clear how he could have taken that many steps or moved that far during a presumably rapid fall. Also, as Root steps towards him, she uses her foot to move his gun two or three feet further out of his reach, yet when the camera pans backward after the Machine convinces her to spare his life, the gun is nowhere to be seen in the foreground.