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How to treat a ritalin addiction 
Look for early symptoms of addiction. 
These symptoms can include feeling the need to use the drug often, having cravings for ritalin that consume your thoughts, and needing more and more of the drug to feel the same way. You may start taking more and more of the medication without even realizing it.
You might also start feeling sick when you don't take it. In this stage, you'll start to feel like you need to make sure you have a supply of the medication around all the time.