Abstract
We present a case of a 53-year-old person living with human immunodeficiency virus and a new diagnosis of latent tuberculosis. The patient had baseline suppressed HIV viral load on fixed dose combination dolutegravir/abacavir/lamivudine when once-weekly rifapentine 900mg/isoniazid 900mg/pyridoxine 25mg was initiated for 12weeks. An additional 50mg dolutegravir dose, administered in the evenings, was added to the daily antiretroviral regimen for treatment duration secondary to rifapentine uridine diphosphate glucuronsyl transferase induction. Dolutegravir trough concentrations decreased during concurrent therapy with noted slight HIV viral load rebound. Upon completion of rifapentine use, and a return to dolutegravir 50mg daily dose, the trough concentrations increased with a return to an undetectable viral load. We provide suggested dolutegravir dosing considerations with concomitant rifapentine use, not currently addressed in recommended guidelines.
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