What is the effective medicine for boil?

Boil medication: The only effective way to get rid of a boil (abscess) (a) is to have it incised and drained (I&D) to remove the pus in it and allow the tissue to heal.This is because antibiotics cannot penetrate to the center of the a to kill the bacteria. Antibiotics used to contain the infection, until and I&D can be done, are usually Keflex and levaquin (levofloxacin). If you have an a, see a doctor and get evaluated.