Metallic. [he makes a face because it really does taste like blood in the mouth and that's never a pleasant sensation. still, he opens his mouth and rubs a finger over his tongue to make sure he's not actually bleeding as a side effect. so far, so good.] Strong citrus or something similar, if I had to guess.

Or based on a tincture, which would explain it better.

[it's even in his nose, which is unpleasant.]

How is my complexion looking?