Well, now that you mention it.....I've had almost exactly this happen. Difference: my "ringing" is more of a low roaring noise, like distant traffic noise. Whether ringing or the noise I hear, this is known as tinnitus. I'm on plain generic metoprolol and lisinopril. I don't think tinnitus has been reported as related to these drugs, but I haven't checked thoroughly. My cardiologist was unaware. An ENT specialist said he sees tinnitus after OHS, but doesn't know why it occurs and said there is no treatment. My tinnitus and the other sensations you report, which I have had as well, have come and gone, or at least gotten somewhat better then resurged, for about 4-5 months starting about 3 months post-op. Sometimes it interferes with hearing, especially hearing speech and relatively quiet sound. But I just noticed that it seems not to have been a problem for the last few days. I can ignore the tinnitus noise and have no trouble sleeping. So, I've more or less let this go on. But you raise a good possibility. I'm a pharmacist (retired) and don't recall this as being among side effects of beta blockers, and if this were due to metoprolol, you would generally expect it with other beta blockers unless it is due to one of the other effects, like alpha agonist or beta 1 vs. beta 2. I guess I should look into it more. Initially this felt a lot like a middle ear infection, wouldn't you say? It wasn't quite right (not as much sound muffling as a middle ear infection, and the tinnitus is usually not part of an infection), but I decided to see what it would do, as middle ear infections in adults are self-limited and will resolve on their own or with a little Sudafed to help drainage. But it didn't get better, and after a couple of months I had my doctors check - no fluid, no infection. The ENT did a thorough hearing test and found nothing remarkable but wants me to repeat it in 6 months. Other than some trouble with the tinnitus noise interfering with quiet sound hearing, my hearing loss has not been marked.
