This is Necromancy but I'm surprised nobody quoted this, which would've solved the issue in one line :
from the Alchemy supernatural ability of the Alchemist :
"the effects of an extract exactly duplicate the spell upon which its formula is based, save that the spell always affects only the drinking alchemist".
If you brew the extract as an infusion, replace "alchemist" with "target", and there you go.
A cure light wounds extract would heal the Alchemist alone, and you'd have to take the infusion discovery to heal others with your cure light wounds formula/extract/infusion.
