 <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] itonavir, certain drugs used to treat seizures (such as carbamazepine, phenytoin), among others. This medication may interfere with certain lab tests (such as amylase/lipase levels, allergy skin test), possibly causing false test results. Make sure lab personnel and all your doctors know you use this drug. Does Z-Tuss AC interact with other drugs you are taking? Enter your medication into the WebMD interaction checker Check InteractionThe overdose of Z-Tuss 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: confusion, cold/clammy skin, fast/slow/irregular heartbeat, slow/shallow breathing, seizures, coma.  Notes Do not share this medication with others. Sharing it is against the law.  Missed Dose If you are prescribed this medication on a regular schedule and miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the </s>