Otitis media with effusion, can boric acid and menthol ear drops be used without pus?

Patient's question:

Sore throat caused by cold leads to muffled ears, hospital said it's secretory otitis media, eardrum is not perforated, no pus discharge

Doctor's answer:

When the eardrum is intact, the purpose of applying ear drops is not to treat purulent otitis media or secretory otitis media. Recommendations: If ear drops are used to treat external otitis, they can also be applied when the eardrum is intact. If it is secretory otitis media, ear drops are not necessary for treatment.