In the market for a new allergy medication? Jimmy Fallon [1] and Robert Downey Jr. can help narrow down your search. The late-night host and Dolittle actor [2] just joined comedic forces to spoof a commercial for an allergy medication dubbed Zynerma, and the made-up drug has all the qualities you definitely don't want in a decongestant.

Dressed in ridiculous wigs and '90s dad-like outfits, Jimmy and Robert didn't rehearse the absurd lines before the cameras started rolling, and it certainly showed as they broke character left and right [3] while reading from the cue cards. Jimmy couldn't help but let out a chuckle while declaring, "Best of all, they're shaped like Flintstones characters. Not the pills — my nipples." I mean, can you blame him? Watch the hysterical commercial parody above, and if you're still in the mood to see Jimmy lose his sh*t during a sketch, may we suggest his "Cue Card Cold Read" video starring Jessica Biel [4]?