Well, if it’s premixed CHGZGJT it should have THF in there as an ingredient. Tian Hua Fen is cold but it’s also moistening, so if they have sticky phlegm then they’re likely to have the problem worsened by THF. GL and THF are almost opposites, kind of like Ma Huang and Ma Huang Gen. If I were you, I would just mix it with single herbs to get it just right.