Extract Methadone/Polamidon-(Levomethadon)

[pola(a)dicct(ed)]

Hello everyone, I've been asking myself the following question for a while: Let's assume hypothetically that you get a Polamidon solution with 50% viscose agent as an additive on top, ie. 2.5ml of viscose agent are added to 5ml of Pola solution and at the end you get 7.5ml of liquid. Now to my question, how do you separate the whole thing from each other again? Couldn't you just let the liquid evaporate? Or could one not transfer the active ingredient into any other solvent where only the active ingredient without viscose remains? Thanks in advance