Upon receipt of laboratory results, you notice that his eGFR is ~40mL/min, his serum creatinine is 3.0 mg/dl, and his BUN is 50 mg/dl.
How will the medication regimen(s) have to be adjusted given these new laboratory findings, and how should you be monitoring for efficacy and toxicity of this patient's pharmacological profile with a summary of where this patient currently stands in his medical treatment?
(Pt being treated with Levofloxin 750 mg daily for five days)