 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  (such as antacids, ranitidine, omeprazole), check with your pharmacist to see if your brand may be affected. Methylphenidate is very similar to dexmethylphenidate. Do not use medications containing dexmethylphenidate while using methylphenidate. This medication may interfere with certain medical/lab tests (such as brain scan for Parkinson's disease), possibly causing false test results. Make sure lab personnel and all your doctors know you use this drug. Does methylphenidate HCl oral interact with other drugs you are taking? Enter your medication into the WebMD interaction checker Check InteractionThe overdose of Methylphenidate HCl Oral: If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: vomiting, agitation, confusion, sweating, flushing, muscle twitching, hallucinations, seizures, loss of consciousness.  Notes Do not share this medication with others. Sharing it is against the law. Lab and/or medical tests (such as blood pressure, complete </s>