 <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 rifabutin, rifampin), ritonavir, certain drugs used to treat seizures (such as carbamazepine, phenytoin), among others. This medication may interfere with certain lab tests (such as urine 5-HIAA levels, urine VMA levels, amylase/lipase levels), possibly causing false test results. Make sure lab personnel and all your doctors know you use this drug. Does Guaiatussin AC interact with other drugs you are taking? Enter your medication into the WebMD interaction checker Check InteractionThe overdose of Guaiatussin AC 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: fast/slow/irregular heartbeat, slow/shallow breathing, cold/clammy skin, coma.  Notes Do not share this medication with others. Sharing it is against the law. This medication has been prescribed for your current condition only. Do not use it later for another condition unless </s>