
thenobledrake |
It doesn't require a counteract check, as it's not counteracting the condition or toxin it's used against. I say that because if it were counteracting, it would always clear the whole effect away not just reduce it by some amount.
That's why there's a neutralize poison spell that can also treat poison, and it's higher level than restoration despite that spell having a wider variety of effects it can handle - because neutralize poison completely counters a poison, but restoration can only reduce the stage.