Can a Co-Codamol (codeine and paracetamol) overdose result in persistent dizziness for weeks afterwards?

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Last updated: July 7, 2025View editorial policy

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From the Research

Yes, a Co-Codamol overdose can potentially cause persistent dizziness lasting for weeks afterward. After an overdose, some individuals may experience prolonged neurological symptoms including dizziness, vertigo, and balance problems as their body recovers from the toxic effects. This is particularly concerning because Co-Codamol contains two active ingredients that can cause harm in overdose: paracetamol (acetaminophen) can cause liver damage, while codeine can cause central nervous system depression. The persistent dizziness might result from several mechanisms, including temporary damage to the vestibular system, lingering effects on brain neurotransmitters, or as a symptom of liver injury if the paracetamol component caused hepatotoxicity.

According to a study published in the British Journal of Clinical Pharmacology in 2017 1, patients presenting following massive paracetamol overdose are at higher risk of organ injury, even when acetylcysteine is administered early. This suggests that the severity of the overdose plays a significant role in determining the risk of complications, including persistent dizziness.

Key factors that influence the risk of persistent dizziness after a Co-Codamol overdose include:

  • The severity of the overdose, with higher doses increasing the risk of complications
  • The timing of medical intervention, with early treatment reducing the risk of liver damage and other complications
  • Pre-existing health conditions, which can affect the body's ability to recover from the overdose

Anyone experiencing persistent dizziness following a Co-Codamol overdose should seek immediate medical attention, as this could indicate serious complications requiring treatment. Medical professionals may need to conduct tests to determine if there is ongoing liver damage or other complications contributing to the persistent symptoms.

In terms of treatment, a study published in the Annals of the Academy of Medicine, Singapore in 2006 2 highlights the importance of prompt treatment with intravenous N-acetylcysteine in cases of paracetamol overdose. However, the most recent and highest quality study on this topic is the 2017 study published in the British Journal of Clinical Pharmacology 1, which provides more detailed guidance on the management of massive paracetamol overdoses.

Overall, the risk of persistent dizziness after a Co-Codamol overdose is a significant concern, and prompt medical attention is essential to minimize the risk of complications and ensure the best possible outcome.

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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