<prompt> Answer this question truthfullyWhich renal tubular defect can be caused by nephrotoxins or drugs such as ifosfamide, cisplatin, tenofovir, and expired tetracyclines?  <response>: <reason> Fanconi syndrome is the renal tubular defect that may be caused by nephrotoxins or drugs such as ifosfamide, cisplatin, tenofovir, and expired tetracyclines. 