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Can I take Amitriptyline and Zapain together?

Drug interaction guide

Taking these two medicines together can make you feel very drowsy, dizzy, and confused. It can also slow down your breathing and make you more likely to experience constipation or a dry mouth.

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Why this happens

Both amitriptyline and Zapain (which contains codeine and paracetamol) affect the central nervous system. Amitriptyline is an antidepressant and Zapain contains an opioid (codeine); when combined, their sedative effects add together. Additionally, both drugs have 'anticholinergic' effects, which can lead to side effects like a dry mouth or constipation.

What you should do

You should speak to your doctor before taking these together. If your doctor has prescribed both, be aware that you may feel very sleepy. Do not drive or operate machinery until you know how they affect you. Avoid drinking alcohol, as this will make the drowsiness much worse. Seek medical help immediately if you experience extreme sleepiness or difficulty breathing.

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Using other medicines

Taking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.

Disclaimer

This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.

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Article history

The information on this page is written and peer reviewed by qualified clinicians.

  • 25 Jan 2026 | Originally published
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