I'm really curious too, as @ericy210 is the only person I've seen in this forum who's mentioned trying amantadine. But maybe those who get better no longer have need of the forum >_< .

I can tell you that it's worth asking your doctor about. The Long COVID Clinic at Northwestern Medicine in Chicago routinely prescribes it, and you can find published papers about it online.

I'm just really nervous about side effects because I'm very sensitive to medication, and I like to know what to expect so I can weigh pros/cons, but I can't find any others who've taken it for Long COVID or even for MS-related brain fog who've shared in more detail about their experience. My neurologist said it's something they use, but it might be more specialized since it's been used for MS-related brain fog.

I can and have asked my doctors of course, but they always say something to the effect of: "It's a low dose, and it's generally well-tolerated, or side effects are short-lived," but they always say that, and it hasn't been true in my situation in many cases, so I get frustrated. Then, "The only way to know is to try," true. But if I'm going to try, I want at lease some semblance of an idea of what to expect. Sigh.