>10%
Abdominal pain,Hemolytic anemia in G6PD deficiency,Nausea,Vomiting
<1-10%
Methemoglobinemia in NADH-methemoglobin reductase-deficient individuals
<1%
Agranulocytosis,Arrhythmias,Headache,Interference with visual accommodation,Leukopenia,Leukocytosis,Rash,Dizziness,Pruritus
Potentially Fatal: Haemolytic anaemia (G6PD deficient), thrombocytopaenia, leucopaenia, AV block.