Hello Madam/ Sir,
its really sad to know that sister's pet dog bit her. hope the dog is vaccinated for RABIES
. otherwise she needs rabies vaccination
as an emergency.
prophylactic(giving before infection) systemic antibiotics are not recommended. she will be benefited by applying a topical cream like mupirocin
. and for pain relief & swelling she can take oral pain killers like paracetamol/ibugesic
do convince her for a physician opinion if the nose wound worsens. hope she recovers soon.
Dr. Kanimozhi. S