The following antibiotics are all safe to take whilst breastfeeding;
Amoxycillin, Amoxil 250-500mg three times a day
Azithromycin, Zithromax, 500mg daily
Cefaclor, Distaclor, 375mg twice daily or 250mg three times daily
Cefuroxamine, Zinnat, 250mg twice daily
Cephalexin, Cefalexin, Keflex, 250mg four times a day
Cephradine, Velosef, 250-500mg four times daily
Clarithromycin, Klaricid, 250mg twice daily
Co-amoxiclav, Augmentin, 375-625mg three times a day
Co-fluampicil, Flucloxacillin 250mg + Ampicillin 250mg, Magnapen 500mg four times daily
Erythromycin, Erymax, Erythroped, Erythrocin 250-500mg four times a day with food
Flucloxacillin, Floxapen, 250-500mg four times a day one hour before food
Penicillin V, Phenoxymethyl penicillin 250-500mg four times a day one hour before food
Trimethoprim, Monotrim,200mg twice daily