 <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]  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 blood count, height/weight monitoring in children) may be done while you are taking this medication. Keep all medical and lab appointments. Consult your doctor for more details. There are different brands and forms of this medication available. Not all have the same effects. Do not change brands or forms without consulting your doctor or pharmacist.  Missed Dose If you miss a dose, take it as soon as you remember. </s>