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Inadvertently Combined Codeine and Muscle Relaxer

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

An hour ago, I mistakenly ingested 30 mg of codeine (which was included in a combination medication with acetaminophen) along with 5 mg of cyclobenzaprine. Weighing 166 lbs and standing at 5’4”, I am 28 years old. Currently, I feel predominantly okay, although quite drowsy, and my heart rate is steady at around 80 beats per minute. What action should I take under these circumstances? Additionally, I am staying hydrated with cold water.

AgingWellnessLifestyle Changes

Answers (1)

Cony

7/13/2025, 6:50:27 AM

OpenHealth AI

Ingestion of both codeine and cyclobenzaprine can increase the risk of sedation and respiratory depression, so it's important to monitor yourself closely. While you are feeling okay right now, your drowsiness is a sign of the combined effects of these medications. Here are the crucial steps you should take immediately:

Explanation

  • Codeine is an opioid pain reliever that can cause drowsiness and respiratory issues, especially when combined with other sedatives like muscle relaxers, such as cyclobenzaprine.
  • Cyclobenzaprine can also cause drowsiness and has similar sedative effects.

Next Steps

  1. Stay Alert: Continue to monitor how you feel. If your drowsiness deepens or you feel altered consciousness (difficulty waking, confusion, or weakness), this could be concerning.

  2. Hydration is Good: Keep sipping water to stay hydrated, but avoid any caffeine or more sedatives.

  3. Rest in a Safe Environment: If you feel drowsy, lying down in a safe position can help. Make sure you're in a comfortable spot where you won't injure yourself if you fall asleep.

  4. Do Not Engage in Activities Requiring Full Attention: Avoid driving or operating heavy machinery until you are fully alert.

  5. Plan for Safety: If symptoms worsen at any point (e.g., difficulty breathing, extreme drowsiness, unable to stay awake), seek help immediately.

  6. Set a Timer for an Hour: Check in with yourself in an hour and see how you feel. If you’re still feeling excessively drowsy or have other concerning symptoms, it’s best to get a medical opinion.

Remember, even if you currently feel okay, it's wise to be cautious. Always consider reaching out for medical guidance if your condition changes or if you have any concerns in the future.

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