My Pharmacist told me to be careful with it like all antibiotics you can become immune to it do to speak.

Jungle mum I have found the best thing for boils is to put a dollop of castor oil on with a bandaid over the top to draw it out and once the gunk is out then put Betadine antiseptic on with a bandaid to kill off any nasties in there ( as told by a naturopath). Boils need your body to fight them off so the less antibiotics the better.