The wife in an older couple is distraught because her aging husband's um
... little sailor doesn't salute anymore. She goes to her doctor and
explains the situation.

The doctor thinks for a bit and says, "I wouldn't usually prescribe this,
but since your husband won't live that much longer anyway...Here's a
prescription. Give him three drops in a glass of milk before he goes to
bed." The wife leaves, thanking the doctor profusely.

Two weeks later, the woman shows up at the doctor's office and he asks her
how it went. The lady blushes and says, "Well, I squirted thirty drops in
his milk by accident, and ummmm, well,...now we need an antidote so we can
close the coffin!"