I can't say weather or not your meds or herbal remedies are contributing to your tinnitus or not. It is very likely it could have been the high blood pressure med but would think that you would have more of a pulsating tinnitus (sounds like your heart beating) which is more associated with blood flow.
Some people have taken Vinpocetine as a tinnitus rememdy but the verdict is out on these herbal remedies for tinnitus.
I'm curious as to why your doctor prescribed betaserc. I'm not real familar with this drug as to the best of my knowledge is not available in the US. It seems to be a Middle Eastern drug used for people with meniere's. Am I correct? VN and meniere's are two different inner ear disorders. Usually meniere's patients are prescribed a dieuretic to help control the fluid in their middle ear (which I'm thinking may be what betaserc is). Did you have any testing that would indicate a problem with your fluid level in your inner ear? I could very well see this med contributing to your tinnitus as well if betaserc does what I think it does.
I believe the only real way of knowing weather or not it is the vinpocetine or the betaserc is to stop the meds all together to see if the tinnitus stops. Have you talked to your ENT after stopping the blood pressure med to let him know you are still having the tinnitus?
From what I know, typically if it is med induced, the tinnitus has a good record of disappearing after stopping the meds. Could take some time to disapate if it is the meds.
I do know of a few individuals that got tinnitus after VN and their tinnitus did eventually go away so stay positive.
Did your tinnitus subside eventually or become permanent
My story is a little different than the norm as I'm not so sure I ever had an inner ear disorder that caused my ear symptoms and dizziness. I am still recovering and am almost 3 years into it. I have many of the symptoms others on the board have experienced but believe mine was the result of a very severe allergic reaction I had to an antibiotic followed by an ear infection. I was diagnosed with brain damage which affected my auditory system causing my tinnitus. I believe my tinnitus is a result of damage to my CNS. I was given a prognosis of 2 - 5 years. I have improved greatly in some areas but my battle is not over yet. One of my hardest symptoms to cope with is the tinnitus. Mine came on about 6 weeks into this whole ordeal. I can not say if mine is permenant or not as no one really knows. I hope the heck it isn't. I do know of people whose tinnitus resolved itself with time. I even met someone the other day that had theirs go after 3 years.
For a unilateral loss like 75%, how long normally it takes to recover?
There are some very good videos in the sticky above the threads by Dr. Rauch that really explains VN well and the recovery period. I really recommend watching them. I don't think anyone can really put a time frame on this junk, but I can assure you that I do know of people who have recovered fully.
Hope the tinnitus resolves quickly for you as I know it is no picnic.