HI, my son is 7 and has been on ritalin about 3 yrs. The weight thing has been a concern as well on that med. He's been on the height = weight schedule for a while. So he's skinny, but is still within normal range. the benefits of the meds so far outweigh the low weight.
He barely eats anything for unch- I pack cheese and crackers, apple juice and some fruit, and I'm lucky if he eats that. He's started eating yogurt at home and school breakfast, but I don't know how much. he likes eggs so i make egg tacos at home fot lunch, dinner or snack.
I buy whole milk for him. He doesn't like meat except for chicken - he'll eat chick-fil-a and wendy's nuggets, and loves Pei-Wei honey chicken, so I've learned to make that at home. (just cut up chicken and marinate in honey and saute) and its sweet enough he wants to eat it with rice. I limit candy because 1) it makes him hyper and 2) makes him not want to eat anything else.
If the meds are helping, then just try to find what he'll eat and feed it as much as you can.
wish i could help more - let me know if there's anything else I can answer.

thank you so much. I really think I will try to make that chicken with the honey. Chicken is on thing he will eat also. I notice he starting to get sick of it. So trying something new is great idea. I usually will feed him anything for dinner he'll eat wether its waffles, pasta, chicken, doesn't matter because when he is hungry I want him to eat. thanks again.

Hey I let my son live on chicken nuggets from McDonalds for like a year because that's all he would eat. He also loves peanut butter! Do you allow him to eat whenever he gets hungry even in the middle of the night?

Yes if he woke up hungry I would let him eat anytime. Luckly he never wakes up in the middle of the night. His most hungryest is before bed. I think he has 4 snacks before bed. Ever time I give him dinner he eats 2 bites and says he's full. Even if he asked for it to eat. It's definatly challenging.

It's hard for me to offer suggestions about weight because I was such a picky eater my mom said I'd pick my way through a bowl of lettuce.
My son was born small and stayed small. I turned him around before he reached 20 pounds because his legs were all scrunched up. I put him in a booster seat before he reached 40 pounds because the car seat straps were leaving marks and bruises they were so tight. When he finally reached 40 pounds I actually celebrated because it took sooooooo long. A lot has to do with medicine but it also has to do with genetics. My mom was constantly worried about me but I think I learned from her experience because I didn't worry about my son I figured he'd eat when he got hungry. Right now he eats from the time he gets home from school to the time he falls asleep literally. If he doesn't get enough to eat before bed he'll wake up extra early like 4 am asking for food. I keep a snack box for him with those little bags of cereal, peanut butter crackers, cheese nips, pretzels, party mix or trail mix. We buy everything in bulk so he gets to pick out one thing that's "junk food" and usually that's fruit roll up or fruit gummies and the jack pot is one box with both in it! I just regulate how many are in the box at a time and the box stays on top of the fridge so he has to wake us up to get to it and he's only allowed one "junk item" I hope this helps but the best advice of all is kids will eat when they're hungry!

I'm not saying don't listen to the doctors but I really think this day and time kids have gotten so big when they see a "normal" or slightly "abnormal" weight in a child they get concerned but do some research and find out what's normal weight for his age and you may even want to look a few years back because they have increased this range recently. They tried to tell me that my child was underweight when he was born. He weighed 5 lbs. 15 oz. a normal weight for a baby is 6-8 lbs. so he was a whole ounce off but he didn't lose any weight in the hospital either.

I really wouldn't get concerned about Chris' weight unless he started losing!

I too have a 6 year old (adopted)that is only 33 lbs and 42.25 hgt. He was on Vyance and now concerta. He just won't eat and it worries me. He is skin and bones. Really mouthy on meds and has melt downs. In our 60's and having a hard time. Without meds, impossible.

BE CAREFUL!!! Lack of eating can cause major height decrease... my parents put me on stimulants when I was young (I wish they had not!) and it caused me to hardly eat... and I am very small now in comparison to my sister and other family members... I am only 5 feet tall because of this. You may want to take him off... or talk to the doc. about this because it is a concern

shirleysnbk I total know what you are saying. It does scare me. I am definatly at the point that what ever he wants to eat I feed him. I do notice he will eat a good breakfast. Maybe if you grandson will eat breakfast thats a start. My son loves waffles. Sometimes I even give them to him for dinner. I feel as long as he puts food in his belly I am happy. Also I no he could never be off meds, he is to hyper and drives me more crazy. He can never focus just goof off and get into trouble. On the meds he can be very mouthy also unfortunatly I've tried taking things away from him like video games but doesn't always work. The one thing I did do was a responsibilty chart. Giving minor chores like making bed, cleaning room, brushing his teeth, and also have added his behavior.(listening, not arguing) things like that. When he does well he recieved an allowance every weekend. I don't make it negative at all. I praise him and daily tell him great job with everything if he does good. It is working wonderful. He get excited to fill in his own chart daily. Hope you can take anything from this. good luck. If you need my help with anything or want to talk, email me anytime. good luck.