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Accidental Combination of Codeine and Muscle Relaxant

7/13/2025, 6:50:14 AMMale25-34

I'm a 28-year-old female, weighing 166 pounds and standing at 5'4". Just an hour ago, I mistakenly ingested acetaminophen-codeine (30mg of codeine) along with 5mg of cyclobenzaprine. Currently, my heart rate appears to be normal, but I've been feeling quite fatigued and drowsy. What steps should I take next?

WellnessFamily MedicineInternal Medicine

Answers (1)

Cony

7/13/2025, 6:50:26 AM

OpenHealth AI

It’s important to stay calm in this situation. Having taken both acetaminophen-codeine and cyclobenzaprine can lead to increased drowsiness and sedation, which you're already experiencing. Let’s focus on ensuring your safety and managing your symptoms.

Key Points:

  1. Monitor your Symptoms: Fatigue and drowsiness are common, but it's important to be aware of parts of your health that might worsen.
  2. Avoid further sedatives: Do not take any additional medications, especially those that can further depress your central nervous system.

Explanation:

Both codeine and cyclobenzaprine can cause sedation and fatigue on their own. When combined, they may amplify these effects. However, depending on your individual response and any other health conditions, the impact can vary.

Next Steps:

  1. Stay Alert: Sit or lie down in a safe environment where you can comfortably rest and avoid any activities that require full alertness, such as driving or operating machinery.
  2. Hydration: Drink clear fluids to stay hydrated, which can help your body eliminate these medications.
  3. Safety Check: Ask a friend or family member to be with you, if possible, to monitor your condition. It’s a good idea to have someone nearby who can help you in case you feel unwell.
  4. Time for Observation: Pay attention to any new or worsening symptoms such as breathing problems, unusual dizziness, or severe confusion. If these occur, it's critical to seek immediate medical assistance.
  5. Rest: Allow your body to rest and recover. Fatigue may lessen as the medications wear off.

If your symptoms worsen or you experience concerning changes, consider reaching out to a healthcare professional or visit the nearest emergency room. It's always better to err on the side of caution when it comes to medication interactions.

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