Table 1. Laboratory findings.

Laboratory findings showed an acute kidney injury, a toxic level of metformin, and no evidence of infection.

	Results	Normal range
Serum urea (mg/dL)	255	17-43
Serum creatinine (mg/dL)	11.40	0.7-1.3
Serum metformin (mg/L)	24	Toxicity risk >5
C-reactive protein (mg/dL)	0.3	<0.5
Procalcitonin (ng/mL)	0.01	<0.05
Blood cultures	Negative	Negative
Urine culture	Negative	Negative