I've been on zithromax since 1/21 for inner ear and sinus infection, but still have the dizziness, when will it go away or could it be a brain tumor?

Ear infection: Inner ear infections can affect balance. This is a complex system and usually will recover slower than the actual infection, sometimes as long as 3-4 weeks. If symptoms persist longer than this timeframe, reevaluation is indicated by your treating physician. Brain tumors of the inner ear can cause dizziness as a presenting symptom, but most of these tumors present with hearing loss.