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Can I take Morphine and Zomorph together?

Drug interaction guide

Taking morphine and Zomorph together is effectively taking a double dose of the same medication. This significantly increases the risk of serious side effects, including extreme sleepiness, breathing difficulties, and accidental overdose.

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Why this happens

Zomorph is a brand name for a 'modified-release' version of morphine. Both medications contain the same active ingredient (morphine). Taking both at the same time leads to an additive effect, where the total amount of morphine in your system may exceed safe levels.

What you should do

Do not take these two medications together unless specifically instructed by a pain specialist. If you have been prescribed both, check with your doctor or pharmacist to ensure you are not duplicating your dose. If you experience extreme drowsiness or difficulty breathing, seek emergency medical help immediately.

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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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