The Impatient Patient is a 1942 Warner Bros. Looney Tunes cartoon directed by Norman McCabe. The cartoon was released on September 5, 1942, and stars Daffy Duck. The film is set in a mad scientist's laboratory.

This cartoon was colorized in 1968 (just after Seven Arts Productions, successor to Guild Films, to whom the TV distribution rights to the black-and-white cartoon library had been sold some time before, acquired Warner Bros.) by having every other frame traced over onto a cel. Each redrawn cel was painted in color and then photographed over a colored reproduction of each original background. The animation quality dropped considerably from the original version with this method. The cartoon was colorized again in 1992, this time with a computer adding color to a new print of the original black and white cartoon. This preserved the quality of the original animation (the end result also resembled the actual color cartoons released around the same time).

Adding to the medical theme, the signatures of the personnel credited (McCabe, writer Don Christensen, animator Veve Risto and music composer Carl Stalling) were featured in the opening credits, just as a doctor would sign a prescription.