Antiplague

Source Advanced Player’s Guide

If you drink a vial of this foul-tasting, milky tonic, you gain a +5 alchemical bonus on Fortitude saving throws against disease for the next hour. If already infected, you may also make two saving throws (without the +5 bonus) that day and use the better result.

Create: Craft (alchemy) DC 25

Alchemical Power Components

Source Adventurer’s Armory

Certain healing spells have greater effects when used with antiplague.

Heroes’ Feast (M): For each vial of antiplague used as a power component, one creature eating the feast gains the benefits of antiplague for 12
hours. Antiplague’s normally foul taste does not change the taste of the feast.

remove disease (M): Add +2 on your caster level check to cure diseases on the target.

An alchemical power component is an alchemical item used as a material component or focus for a spell in order to alter or augment the spell’s normal effects. What follows is a sample of these effects using this item as a component; your GM may allow other combinations. 

• Spells followed by an (M) expend the alchemical item as a material component;
•  Spells followed by an (F) use the item as a focus and do not expend it.

In both cases, the alchemical item does not have its normal effect and does not affect any other parameters of the spell. You cannot use the same item as both a focus and a material component at the same time.