A 24 year-old male comes to your office for some laboratory tests prescribed by his infectious diseases specialist. He started on isoniazid as part of his treatment for latent tuberculosis 6 weeks ago. Patient reports he has been taking isoniazid as prescribed. He does not report any symptoms today. His physical examination is unremarkable. The laboratory test results include the following: Serum Reference Range Alanine aminotransferase (ALT) 88 U/L 10 – 40 U/L Aspartate aminotransferase (AST) 96 U/L 12 – 38 U/L Alkaline phosphatase 104 U/L 25 – 100 U/L What is the next best step in the management of this patient?
