Concerta has been known to cause some people to have heart palpitations, tachycardia (irregular heart beats, especially fast ones), and blood pressure changes. If you are experiencing these, I wouldn't wait to talk to your doctor; I would urge you to go to an ER, especially if your arm is feeling numb... you could be having a heart attack. Not trying to scare you, just concerned. Hope this helps.
- Concerta Information for Consumers
- Concerta Information for Healthcare Professionals (includes dosage details)
- Side Effects of Concerta (detailed)
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