Royal jelly treats infection as well.

Because Really Bad Day is just that addictive.
Whoops, you're outside the closing paren there.  The double-paren after stung closes both the effect and the list (the second closes the if-paren before p->has_effect ("poison")).  Fix that and we can talk about merging, though I'm not sold on one shot of royal jelly completely clearing up the Really Bad Day.