My Husband Has Had Ear Pain For About 2 Weeks

My husband has had ear pain for about 2 weeks now. He finally went to the dr and was diagnosed with an ear infection and prescribed antibiotics.
He has been known azythromiacin for 6 days and for the past 3 days he has had a great mucus discharge from his ear and severe hearing loss.

Should he go back to the dr or wait out for the antibiotics to finish their job? I don't want him to have permanent hearing loss from this.