Question 62

Dapsone is an oral medication commonly used to treat ocular cicatricial pemphigoid. When prescribing this medication, which lab must you check prior to initiating this drug regimen?

Glucose-6-phosphate dehydrogenase (G6PD) deficiency

Tuberculin skin test

Activated partial thromboplastin time (aPTT)

Thiopurine methyltransferase (TPMT) deficiency

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