Please choose the correct ending to complete the given sentence: Health: [header] How to treat a ritalin addiction [title] Look for early symptoms of addiction. [step] 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.

Ending1: You may also notice certain symptoms and feelings post-usage, and see what is going on. These symptoms will indicate it is time to stop this type of addiction. Ending2: You may even have more withdrawal symptoms than you realized, and side effects can include purine withdrawal, gastrointestinal bleeding, etc. [title] Reduce side effects by chewing a piece of gum. Ending3: You might also start feeling sick when you don't take it. [substeps] 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. Ending4: [substeps] Many users find that this leads to a crave for both ritalin and addiction. Stressful experiences can cause cravings for ritalin, which can trigger addiction.

Answer format: ending1/ending2/ending3/ending4