When my son was 2, maybe 3, one of the best neurologist in my state diagnosed my son with mild ADHD. He was not talking either.
If med was available, I sure would sign up and give it to him. I was simply “too busy” with work. Instead of playing with him after work, I got busy with other “projects”.
I only got awakening up after my wife lectured me. From the moment on, I spent a lot more time with my children. As it turned out, he does not has ADHD and turned out really bright and have a lot of friends at school.