. Hematuria and hemoglobinuria may appear first Cause the mucous membranes to appear muddy or brown & usually accompanied by tachycardia, tachypnea, weakness, and lethargy. Dyspnea may be seen as methemoglobin levels reach or exceed 35%.
.Hematuria and hemoglobinuria may appear firstCause the mucous membranes to appear muddy or brown & usually accompanied by tachycardia, tachypnea, weakness, and lethargy. Dyspnea may be seen as methemoglobin levels reach or exceed 35%.