The problem with the family of drugs of that type, floxins, was they were quite effective antibiotics for severe infections. Thanks to overprescribing, there are now lots of bacteria that are resistant to them. If they hadn't been so widely handed out, we would still have them for severe infections. But they were marketed and pushed by the drug companies and we lost an entire class of antibiotic. Floxins are not alone in having severe side effects, some of the oldest drugs had side effects including hearing loss and required careful dosing and blood tests to assure safe use. But again, those were reserved for life threatening infections, not routine sinusitis type illnesses (unless like a super bad infection eroding towards your brain, but then you're hopefully in the hospital getting IV antibiotics, not outpatient treatment).
Vinpocetine is a weird drug that somehow snuck in under the the supplements rules of the FDA. It does have real side effects like lowering blood pressure, not terrific if you're already on blood pressure pills, and interacts as a mild blood thinner, not good if you're already on blood thinners for other medical problems. Not saying it can't be effective for tinnitus, but I'd check with your doctor and a list of any medicines you take before taking it, believing it's just some sort of safe herbal remedy.
Thanks, I read about the bans on those across the world and did read about the side effects as well. Off the shelf stuff is questionable anyhow. Prescribed meds are dangerous enough by themselves.