My son who is 9 just started taking a 27mg dose of concerta this weekend. We want to see how things will go for him so we have asked him to let us know of any thing that might feel weird or different to him. He has mentioned twice that his tounge feels numb. I have checked for swelling, hives or rash & none of those symptoms of an allergic reaction . have read over the medical information provided through the pharmacist & there is no mention of a numb tounge. Should I take him in or call his pediatrician tomorrow?
Hello, Side effects of Concert include: -cold hands and feet-tingling-and numbness.  If it will not be until the next day before you can reach his doctor, my recommendation is to stop the Concert. Hope I have answered your query. Let me know if I can assist you further.  Take care Chat Doctor.