What Causes Constant Buzz In Ear And Imbalance Upon Waking Up?

I suddenly woke up last morning feeling something not quite ok with my left ear - not sure I was hearing a slight continuous sound like the ocean. However, later that evening after listening to the ipod, it was obvious i could hear distinct sound. This morning when I woke up, felt slight imbalance feeling in the head , like tilting to the right side and definite sound amplified in left ear..i could hear like an echo at times of people's voices. Slept in the afternoon and woke again to feeling 'imbalanced' in the head region.
Went to the ENT dr this evening and she did few tests and said it is mostly Menier's. Has prescribed Vertin 16 3 times a day for now. Please give any feedback for the same as am concerned if this will affect my hearing in future..Thank you