I have an ADHD son who we did medicate thru 5th grade, thats when I said enough it enough, and pulled him and his younger brother out at the end of the year!
We love the time4learning program and supplement it where my boys need it. Spelling is a biggie for us, so we do All About Spelling, and SpellingCity.com. Writing is one that we always seem to do more of we have done time4writing, writing prompts to use with any book, Story of the World for our history ( love all the crafts that the boys do with it) and Singapore Math because my youngest loves math. Of course you would need to see what works for your son, he might be a 2nd grade in one level and 4th in another! My now 3rd grader is doing 4th grade math and 3rd grade LA with time4learning!
Another thing to think about it doing all his subjects related to what he loves most, animals, science, or fantasy reader?? You can tailor to what keeps him interested! I agree I wouldn't medicate my kids unless they needed it, but ever since homeschooling the strongest thing my boys are on is multi vitamins! Let me know if you have any questions about anything I have said. And I am sure that some of our other members will chime in as well