Oil of wintergreen (oral)

Tier 4 — risky / avoid · Methyl salicylate · Fatal toxicity

Contains methyl salicylate, which is rapidly converted to salicylic acid (aspirin) in the body. One teaspoon of wintergreen oil contains the equivalent of about 21 adult aspirin tablets, making accidental overdose extremely easy. Multiple deaths have been reported from oral ingestion, particularly in children. Topical use in small amounts for muscle pain is the only acceptable application. Never take wintergreen oil by mouth.

Dose: AVOID oral use entirely — 1 teaspoon equals ~21 aspirin tablets; fatal overdose from small amounts