 The ingredients that Mississippi recites for Johnny Diamonds recipe  to sober up J. P. Hara are: cayenne pepper, hot mustard powder,  ipecac, asafoetida, and croton oil. Ipecac is a strong emetic,  asafoetida is a spice known for its strong sulfurous odor, and  croton oil is a potent purgative. Anyone who administered this  combination in real life would likely be shot a day or two later  when the patient could finally leave the outhouse, assuming the  unfortunate victim had not died of dehydration from the violent  fluid diarrhea croton oil causes.