Can other people use an alchemist's extracts?

[Yqatuba]

I assume no, but can't find anything in the rules that says so.

[Lelomenia]

Alchemy(Su) wrote:

An extract immediately becomes inert if it leaves the alchemist’s possession, reactivating as soon as it returns to his keeping—an alchemist cannot normally pass out his extracts for allies to use (but see the “infusion” discovery below).

you need the Infusion discovery.

[Ryze Kuja]

This should be in the Rules forum, but anywho, what Lelomenia said. Get the Infusion discovery.