Gulp down a vial of ipecac
Just before the zombies attack,
So, when upon your guts they feast
You die knowing, at least,
That, in the end, you got them back.
See also this limerick’s Undead companion pieces:
According to Wikipedia: Syrup of ipecac, or just ipecac, is a drug that was once used as a cough suppressant and emetic (that is, a vomit-inducing substance). It is obtained from the Carapichea ipecacuanha plant. Scientists have determined that ipecac offers practically zero health benefits, even as a purgative to rid the body of poisons. Like douches, they are relic “cures” that tend to do more harm than good.