A serum glucose > 150mg/dL and leukocyte count above 15000 is 100% specific and 50% sensitive in predicting Fe levels > 300mcg/mL
CBC
Chemistry - notice that this can appear like DKA
Anion gap metabolic acidosis
Hyperglycemia
Coags
LFTs<unk>  levels
Urinalysis
Used to follow efficacy of Fe chelation
Urine changes from rusty colored vin rose to clear
Type and Screen
Xr KUB
In ambiguous cases consider abdominal xray as most Fe tabs are radioopaque
Anion gap metabolic acidosis
Hyperglycemia
Used to follow efficacy of Fe chelation
Urine changes from rusty colored vin rose to clear
In ambiguous cases consider abdominal xray as most Fe tabs are radioopaque

Serum<unk>  concentration can guide treatment but are not absolute in predicting or excluding toxicity
^usually around 4hrs post ingestion although very high doses may lead to delayed peak
Iron toxicity
Aluminum toxicity
Zinc toxicity
Antimony toxicity
Gold toxicity
Arsenic toxicity
Nickel toxicity
Barium toxicity