Calixymenthillian |
I'm fairly certain that haste doesn't, since the Alchemy class ability specifically mentions "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."
On the other hand, the communal spells clarification in the PRD says "A Note on Alchemists: Dispensing communal formulae to creatures requires that the alchemist have the infusion discovery. Without it, the alchemist cannot use communal spells as formulae." Which suggests an exception to the rule of only affecting a single imbiber.