OK, now I know where my problem is after reading a lot of your content patron. Thank you in advance. so my problem is that I don't know much about the acid-base theory to separate ephedrine from pills that also contain theophylline. okay which method is better for me to do? I have 2 methods in this content, I also have a method in the Fester Cookin Crank video. I've tried to follow the 2 methods in the fester video, but it only produces 1/5 of the total ephedrine hcl that I extract. short of knowledge, as far as i know only ephedrine hcl is soluble in water and theophylline is soluble in oil (non-polar). and after I finished this and got ephedrine hcl crystals, I will proceed to the reflux method with Hypophosphorus Acid + Iodine (these 2 ingredients is ready in my minilab). thank you very much. again each of my pills contains 12.5 mg ephedrine hcl & 120mg theophylline, I have 200 pills from each box. which method is good for me to start again with the hope of 100% results. I have prepared another 3 boxes of pills