What is the oral medication that can be used for treating MRSA?

Linezolid, marketed as Zyvox, is an oral antibiotic that is effective against Methicillin-resistant Staphylococcus aureus (MRSA). This medication belongs to a class known as oxazolidinones, which work by inhibiting protein synthesis in bacteria, effectively stopping their growth. One of the key advantages of linezolid is its oral bioavailability, which allows it to be taken by mouth while still maintaining effectiveness against resistant strains like MRSA.

In contrast, other options such as amoxicillin and vancomycin are not suitable for treating MRSA. Amoxicillin is generally ineffective against MRSA due to its beta-lactam structure, which MRSA can resist. Vancomycin is indeed a treatment for MRSA but is typically administered intravenously, especially in severe cases, and is not available in an effective oral form for systemic treatment.

Ciprofloxacin, while it is a fluoroquinolone antibiotic, does not have reliable activity against MRSA strains either. Therefore, linezolid stands out as the correct answer, as it is specifically indicated for treating infections caused by MRSA and is available in an oral formulation, offering a convenient option for outpatient treatment.