Hi doctor, I have been suffering from a blocked left ear, and mainly left sided lightheadedness/mild dizziness, mild tinnitus(recent development) for over 2 months now. I can hear some crackling in affected ear on exhalation, and a kind of tapping/squeaking sound in affected ear on doing valsalva maneuver. Consulted 2 ENTs and a neurologist, all say they can see nothing wrong. Had all types of tests imaginable, head CT Scan, blood test, vitamin b12, vit D, audiometry, tympanogram- all have come normal. Was prescribed azithromycin for 5 days, but no effect. ENT says no fluid in ear due to normal tympanogram result. Please suggest, as it has become chronic. Can I take some other antibiotic like augmentin?