Adverse effects
ADVERSE EFFECT
The most common adverse effect was green–blue discoloration of urine in 42 of 45 (93%) patients in the MB group. Maximum methemoglobin saturation was significantly higher in patients of the MB group (2.9% [IQR 2.2–3.3] vs 0.5% [IQR 0.4–0.7]; Comparison of the change in monitoring values before initiation and after the last dose of intervention. 