 <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]  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: burning pain in the throat/stomach, confusion, mental/mood changes, fainting, weakness, ringing in the ears, fever, rapid breathing, change in the amount of urine, seizures, loss of consciousness.  Notes Do not share this medication with others. If you are taking this medication for a long time, lab and/or medical tests (such as liver/kidney function, blood count) may be done to check for side effects. Keep all medical and lab appointments. Consult your doctor for more details. Because this product contains caffeine, taking it close to bedtime may give you trouble falling asleep. Limit the use of caffeine-containing medications, foods, or beverages while taking this product. If you take too much caffeine, you may become nervous or irritable, have trouble sleeping, or have fast heartbeat. If you are taking this product for headaches, it is best to avoid certain foods that may trigger your headaches. Lifestyle changes such as stress reduction programs, exercise, and dietary changes may help prevent headaches. Talk to your doctor </s>