I was recently diagnosed with significant vestibular weakness of the left ear... i had a bad tooth infection almost a year ago.. and i was givin amoxicillin as a antibiotic, every since i took that pill i have been experiencing dizziness , palpitations et

Possibility: Taking the symptoms you discribe and prefer of ocucannce. In my judgement it is highly likely the Amoxicillin was the cause.

Probably unrelated: Make sure that your dental problem is completely resolved. Go to specialists if necessary to make sure that is still not contributing in some way. I see many ear/vestibular problems in my office. A significant number of them are associated with clenching problems causing some degree of TMJ problems. After you have followed up with your ent, and then your regular dentist, then visit a TMJ dentist.

Sorry: It's unfortunate that you have these symptoms, but they are not related to your having taken amoxicillin. Sounds like you have already had some inner ear testing. If not, see an ENT physician and undergo inner ear testing as indicated (possibly including audiogram, ct scan, vng, etc.). Inner ear disorders are frustrating and can be hard to sort out but are fortunately rarely debilitating.

ENT: This would best be managed by an ENT doc. Could be a drug reaction.