From Pathfinder Gamemastery Guide, which isn't enabled.

Scour

ITEM 8

UNCOMMON ALCHEMICAL CONSUMABLE DRUG INGESTED INHALED POISON

Price 80 gp

Usage held in 1 hand

Bulk L

Category drug

This gritty powder improves responsiveness but suppresses thoughts and leaves you weakened. The saving throw for addiction to scour is DC 30, and the addiction is virulent.

Activate Interact (Ingested, Inhaled)

Saving Throw DC 25 Fortitude

Onset 1 hour

Maximum Duration 6 hours

Stage 1 Stupefied 2 and +2 item bonus to Reflex saves and Dexterity-based skill checks (1 hour)

Stage 2 Fatigued (1 hour)

Stage 3 Drained 2 and fatigued (1 hour)

Pathfinder Gamemastery GuideOGL