I have a person in my household who takes psychotropic drugs, and have a sister whose special needs child takes psychotropic drugs. I myself am ADD and a compensating dyslexic.
I say this to let you know I have compassion for both sides of your struggle with a decision to use drugs or not.
I encourage you to try to find coping skills and healthy living options to optimize your child's best potential.
On the other hand be open to exploring medical treatment. If your child had high blood pressure and you knew he was eating a healthy diet, avoiding vices and getting regular physical activity, sleeping well and was in a good place spiritually, and yet his blood pressure was high, would you insist he struggle with trying to keep the blood pressure down without meds while in the meantime his kidneys were being damaged by the extra high blood pressure. What would have to be done to avoid raising the blood pressure in this un-medicated individual. Perhaps they would avoid exciting music, good books, action movies, falling in love, and successes for life just to afford themselves the opportunity to stay off medication.
The other side of the coin: What might taking medication while he is still young and developing habits and his personality and world view potentially afford him. Is it possible that some of the irregularities of Asperger's might be attenuated with a medication affording him an opportunity to enter or continue adolescence with fewer struggles or diminished struggles. Increased social abilities, and academic successes might enable a higher level of self confidence and allow a greater enjoyment during the hardest years of his life.
Using meds does not have to be a life long sentence, and a well rounded adult might find himself better able to cope without them than challenged teen who is having academic trouble.
Looking back on my life, I wish we had gotten dh psychiatric help about 20 years earlier. I will always wonder what I could have done in college had I not been plagued with not being able to keep up with the reading load and always needed more time on exams. I always tested well on standardized exams, but never lived up to those levels in classes. There was just never enough time. Would a little Ritalin have made it so I could have finished college? It was always so tough to be in labs with students who were making A's and knowing the material way better than them and being able to put into practice far better and explain it to the others, but not being able to finish the exams left my grades average at best and often the reading caused me to get further and further behind as each semester progressed.
If you do try meds, the path might not be smooth. The docs might not have the right diagnosis the first time around. Sometimes the failure of a class of meds can be diagnostic in itself. I remember one my dh took, it seemed like a miracle come true at first then.......well anyway, that failure directed the physician in the right direction and things were better in the next round and have been ever since.
Brain chemistry is interesting. So many aspects of personality and behavior and the way people perceive things can be tweeked with medicine. I would never have believed it until seeing the wrong drugs cause my spouse to become other people I had known in my life. I would then think, wow, that person had too much dopamine on the x or y receptor type. Or this person needed just a tough more serotonin, or......
I pray that you will find help for you son, wherever God sends it from. Better now than later after the best decades of his life have passed.
And until then do not under-estimate the power of Testosterone. Get that boy working. Hard physical exercise, intense sports, gardening, chopping wood, and the like, running, biking, surf fishing, cast net fishing, something physical.