This spell was created originally in order to facilitate mental recovery from brewery research expeditions (in other words, as a hangover cure). However, it was discovered to have a beneficial side effect in regard to protection against injected, ingested, and contact poisons.
Cast upon an individual, it negates the adverse effect of drugs (including alcohol) on the system, restoring the individual to mental coherence and relieving hangovers or other ill effects. Real damage (to body or to mind) is not healed by this spell—it only aids the body in purging the chemicals within it. The chaser will not affect insanity or magically-induced effects.
If the individual was poisoned, the spell allows a second saving throw vs. poison, even if one was not allowed initially.
The spell can be cast as a preventive measure, and if so, its protection lasts for one turn per level of the caster. If the individual is poisoned while under the effect of the chaser, the individual is permitted a +4 modifier to the saving throw vs. poison (or an unadjusted saving throw if one is not normally allowed).
The material component of this spell is a drop of holy water.
Notes: Rare or very rare spell from the Forgotten Realms setting. Known to be in The Wizards' Workbook