ADHD doesn't mean that we have absolutely no self control! It just takes more of a concious effort a lot of the time.
I also find that when I am in certain situations I almost shut down and become extremely reserved. It could be that is what he is experiencing. I don't know the exact why of it but I was labelded shy as a kid but in many ways I am anything but. The bad part of that is that as an adult it has sometimes been interpreted as snobbish behavior. I'm really not a snob at all but I can see where some people might think I am because I don't do well with situations that require mingling so I kind of stick to myself or stay close to the people I am most familiar with.
Another thing to consider is that by the time he gets home from school the medication may be having less of an effect. Does he take it on weekends/holidays and do you see a difference from one part of the day to another?
I like the "they must think I have 2 heads"! LOL...
Some comments I've received from my son's teachers, principal, guidance counselor (in addition to comments about his attention issues) indicate he's polite, always smiling, "Mr. Sociable," etc. Then, I think the same as you - these folks should see how (sometimes) he behaves at home!
Good points by the other posters about home being a comfort zone and a place to let go.
My son was dx last spring with ADHD and is currently on Vyvanse. Well my question is why does he seem to only act out with us at home. Our parents and relatives dont see him how he truely is (all the crazyness). He never seems to get meltdowns in front of them or is loud like he is at home. Sure he gets distracted and impulsive at school. Do you think they can control themselves to a degree?? I feel like I tell my relatives all the crazy stuff he does and they must think I have 2 heads b/c he is sweet and calm around them.he absolutely holds it together then lets it all out when he's home and safe. This is quite common. With all kids I think. Some adults too
. He has to work hard at being calm and sweet, it's gotta come out somehow. Try to look at the bright side he could "do crazy stuff" and have "meltdowns" inf ront of everyone
.Because that is where he feels safest, that is where he can let go and be "himself". Kids are not going to act out in places that they do not feel comfy, at least that is my experience. YES! We experience the same things. And something, too, even when they do act like ADHDers, the people around think "That's just a kid being a kid" because the persistent hyper/impulsive/tantrums/meltdowns haven't added up on the one time surveyor!!
Often times, when I'm with my mom-in-law or mom, and I correct our ds, they will look at me and say "Oh, he's fine, just let him be!" It makes ME look like the crazy one!!
I think there are many reasons for this. Once our ds was diagnosed and was on meds, he has become a little bit shy. Before, he would call everyone at WalMart Grandma or Grandpa and he'd probably have went home with them if they asked! But now he's a little more timid. They are in their 'comfort zone' at home, too. It's just the way it is, but as someone mentioned earlier- I'd rather our ds act like this with us than with anyone else! DH will often pick up ds from a sleep over and we'll hear "He's such a good kid, he's so polite..." and dh will get home and then he looks at me and says "No one else in the world could comprehend what we tell them he's like at home because he's so good every where else!!" Fortunately for us, ds has become pretty comfortable at school and his teacher has become VERY compliant and helpful!

God love 'em!!
Wow...u guys are lucky. My son is hyper/impulsive/inattentive etc... anywhere we go.