G6PD and serotonin syndrome: All patients were ruled out for Glucose 6 Phosphate Dehydrogenase (G-6-P-D) deficiency prior to using dapsone and methylene blue (MB), instructed of the potential side effects of MB (hypersensitivity reactions, anaphylaxis, hemolytic anemia, serotonin syndrome, hypertensive crisis, and syncope) as well as the possibility of extremity pain, urine discoloration, fecal discoloration, hot flashes, dizziness, hyperhidrosis, skin discoloration, nausea, headache, syncope, chest pain, diaphoresis, vomiting, back pain, abdominal/bladder pain, and photosensitivity.