Aspirin toxicity

FREE 150 SPOILER ALERT: I will be forever grateful if someone clarifies a timeline of aspirin toxicity (i.e. going from respiratory alkalosis to metabolic acidosis). Just did the free 150 where someone with 3 hours post aspirin overdose presents with metabolic acidosis. On the other hand, Uworld clearly states that the 12 hours is the transition
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums