Lapacho may have harmful health effects. https://en.wikipedia.org/wiki/Lapacho states eg. “The active ingredients such as lapachol have been found to possess significant abortifacient and reproductive toxicity effects for rats.” and “According to the American Cancer Society … using it risks harmful side-effects.”
As to taste, it’s unlike anything else I’ve tasted, but I didn’t like it at all. Reminds me of the smell of stale tobacco.