<prompt> Answer this question truthfullyWhat is the recommended antibiotic regimen for treating prosthetic valve endocarditis caused by S. epidermidis?  <response>: <reason> The recommended antibiotic regimen for treating prosthetic valve endocarditis caused by S. epidermidis is intravenous nafcillin and rifampin for 6 weeks, along with gentamicin for the first 2 weeks. 