Can ADHD medication impact growth?

Last updated on August 19, 2024

Question:

I have ADHD. I had a late diagnosis. I started taking Concerta several years ago. Over the next two years, I only grew at a rate of about 1-1.5 inches per year (this is less than the average childhood rate of 2 inches a year). I came off the medication last summer, and coincidentally, I have grown rapidly since then. I went back on the medication in late January because I thought it might help me at college. I grew over a centimeter from November to January, but since February, I haven’t gained any height that I can notice. I know, obviously, there’s always a chance that the medication can stunt growth, but I’m wondering how high are the chances.

I’m seriously considering going off the medication again because of the side effects. I’ve also lost seven pounds since I went back on, and my appetite has decreased significantly. Sometimes, on a weekend, I forget to have breakfast or lunch and don’t even notice I’m hungry. Also, I’ve been getting mild stomach pains more often.

Thanks in anticipation.

Answer:

There is evidence that some ADHD medications can impact development. See ADHD Meds Delay Puberty in Boys, Study Suggests. From what I gather, you’ll catch back up if you go off of it soon enough. If you wait too long, you won’t have enough time to catch back up.

If you can learn to manage your ADHD symptoms without medication, you’ll be better off in the long run. The short-run might be difficult, though.

Question:

Thanks for the input. I’m frustrated with my parents for never explaining the possible side effects.

Regarding my growth, I went to the doctor recently because I was concerned about my testicles (which turned out to be nothing!), and the doctor was quite surprised to see the amount of pubic hair I have, even though I look so young and underdeveloped. This sparked questions about my stage of growth. He happened to be familiar with the Tanner stages of development. He seemed to think I’d be in my growth spurt for a while yet despite the early signs of Stage 4. He measured me, and it turns out I’m not much taller than I was three months ago, whereas, before that, I was growing at a much faster rate while I was off the medication. He then said it may be the medication affecting my growth and that if I stayed on it, I may grow significantly less before I reach Stage 4 than if I go off it again.

Do you think it’s too late to grow to my full potential now and that my final height is going to be less than what it would be if I didn’t have the medication? Or do you think there’s a good chance I will catch up fully now despite the three long years I’ve been on the medication?

Thanks in anticipation.

Answer:

I wouldn’t blame your parents. The study I referenced was only released two years ago. It confirms earlier studies that also suggested that many ADHD medications interfere with puberty and growth. So far, it isn’t an absolute, but people are becoming concerned about it. Your parents would not know back when you first started taking the medication.

Guessing what might have happened after the fact is not possible. We don’t have a way of reading your DNA and seeing what your maximum height would be. Since you are in stage 3, which is the rapid growth phase, staying off the medication will give your body the best opportunity to recover and perhaps even catch up for the ground that was lost. Staying on the medication will likely continue to delay your growth until the window of opportunity to grow is passed.

With that in mind, you need to get mentally prepared for the challenge of studying without medication to help you focus. It is doable, but it will take effort on your part. One thing that helps is staying on top of your work so you can do it a little at a time instead of having long major crunches because the work was put off.

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