Hello, There is new guideline by IDSA ( infectious diseases society of America ) which states that you need not give any antibiotic after lancing the abscess ( MRSA ). It has been advised that antibiotic should be given only in few circumstances like.... Multiple abscesses Drainage of pus not proper If sites of infection are face or genitalia If there other associated medical illnesses. Although MRSA abscess can be treated by sulfa drugs,tetracyclines and clindamycin but the best drugs to treat MRSA are VANCOMYCIN or TEICOPLANIN. In your case,you should wait. In case abscess returns,get a culture and sensitivity of the pus done and then take the antibiotic accordingly. Thanks