Tenofovir disoproxil fumarate (TDF) has been anecdotally associated with isolated hypophosphatemia (HP) as well as proximal tubular toxicity and renal dysfunction in which HP has consistently been a feature. Consequently, routine phosphate measurements in TDF recipients have been recommended. We identified and compared the frequency of HP in TDF recipients with that in non-TDF recipients; assessed the reproducibility of HP; identified the incidence of renal dysfunction in hypophosphatemic patients; and evaluated associations between HP and host, HIV infection, or treatment factors.
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