Since the pathology is from inside, due to eustachian tube block in sinusitis
and cold, ear drum gets inflamed due to infection
from behind (middle part of the ear), so antibiotics ear drop will not work as it would not reach behind the intact drum. In such cases systemic antibiotics, nasal decongestants and analgesics help.
However for soothing effect Otogesic
ear drop may be used if available as it gives topical anesthesia
, but not the standard recommendation.