The short answer to your question is that while there are people working towards combining western medications and Chinese Herbal Formulas we are a long way off from doing this well (or even knowing if this is a good avenue to pursue for that matter). Two things seem important for me to stress here - one, there are plenty of viable and effective ways to aid the add/adhd spectrum within pure Chinese Medicine formulas that combining them with harsh drugs would be a step backwards not forwards - two, the synergistic effect expressed by these, often very old, herbal formulas is more than just the sum of their individual actions there is a collective action that becomes stronger than all of them used individually - these kinds of discoveries took hundreds and hundreds of years of trial and error to come forward with and it would more than likely take hundreds and hundreds more to work strong chemically produced medicines into that synergistic effect (if that were to ever happen).
If you are interested in herbal medicine for ADHD I would simply consult with an acupuncturist/herbalist directly and work with them directly. I would not be combining strong western medications with random herbs to hopefully offset side effects without a very intelligent herbalist working at your side.
When we treat people (using acupuncture, tuina and herbs in some cases) we treat them long enough to get a change, then they work slowly with their doctor to come off of their meds, then we balance them out afterwards. It can be slow and it can go quite quickly - it depends on many factors. When we are finished treating, however, often people are more or less permanently well with no further intervention required. The goal of Chinese Medicine is always complete balance (i.e. a complete remission of symptoms) - not long-term management. For some conditions this is more practical and easier to come by than others but the majority of psychological conditions are well served with Chinese Medicine.