Can flucloxacillin be used to treat a dental abscess?

This is a narrow spectrum antibiotic, that targets Strep. aureus, but not much else other than that. It will work against some forms of dental abscess, but I would expect to see something with a bit of broader target range. Common treatments would include: Oral amoxicillin plus metronidazole, Co-amoxiclav monotherapy, or for penicillin alergic patients clindamycin.

If in extreme pain I would personally recomeend the use of Orajel Maximum toothache pain relief gel. It contains 20%w/w Benzocaine which will temporarilly numb the pain