I think the closest one ("but no cigar") might be oscillococcinum, but its popularity isn't due to doctors recommending it (because they don't, by and large).
https://en.wikipedia.org/wiki/Oscillococcinum
> There is no compelling scientific evidence that Oscillococcinum has any effect beyond placebo.
Does not sound promising
https://en.wikipedia.org/wiki/Oscillococcinum
> There is no compelling scientific evidence that Oscillococcinum has any effect beyond placebo.
Does not sound promising