How does morphine work?
Morphine binds to opioid receptors in the nervous system, reducing the perception of pain and providing relief.
What is morphine used to treat?
Morphine is commonly prescribed for:
- Severe pain after surgery or injury
- Cancer-related pain
- Chronic pain (when other painkillers do not work)
- Pain management in palliative care
- Shortness of breath in advanced illnesses
Who can take morphine?
Morphine is suitable for most adults and some children, depending on the severity of pain and their medical condition.
Who might not be able to take morphine?
Morphine may not be suitable if you:
- Have severe breathing problems (such as COPD or sleep apnoea)
- Have a history of opioid addiction or misuse
- Have severe liver or kidney disease
- Have low blood pressure or a slow heartbeat
- Have had an allergic reaction to opioids
Can I take morphine if I’m pregnant or breastfeeding?
Morphine isn’t usually recommended during pregnancy or while breastfeeding, as it can affect the baby. Speak to your doctor about alternative pain relief options.
What if I miss a dose?
If you forget a dose, take it as soon as you remember. If it’s close to your next dose, skip the missed one—do not take two doses at once.
How effective is morphine?
Morphine is highly effective at relieving severe pain, but it must be taken as prescribed to avoid dependence or overdose.
What should I do if I take too much?
Taking too much morphine can cause serious side effects, including slow breathing, extreme drowsiness, and unconsciousness. If you think you’ve taken too much, seek emergency medical help immediately.
What dose of morphine is usually taken?
- For severe pain: 5mg to 10mg every 4 hours, as needed
- For chronic pain: Modified-release tablets or capsules (10mg to 200mg every 12 to 24 hours)
- For palliative care: Dose varies based on the patient’s needs
Your doctor will determine the correct dose for your condition.
Powered by pharmacies
With over 1,700 pharmacy partners across the UK, you can get the help you need, wherever you are based.
Our website and mobile app make it easy and convenient to manage your health needs and book services at a pharmacy nearby.
What are the side effects of morphine?
Common side effects include:
- Drowsiness or dizziness
- Nausea or vomiting
- Constipation
- Dry mouth
- Sweating
Serious side effects, such as breathing difficulties, confusion, or severe drowsiness, require urgent medical attention.
How should I take morphine?
Morphine is available as tablets, capsules, liquid, or injections. Follow your doctor’s instructions carefully.
When should morphine be taken?
Morphine should be taken at regular intervals for ongoing pain relief, or as needed for severe pain.
What are the brand names for morphine?
Morphine is available as a generic medicine, but some branded versions include:
- MST Continus (modified-release tablets)
- Oramorph (oral liquid)
- Zomorph (capsules)
Final thoughts
Morphine is an effective painkiller for severe pain but should be taken with caution due to the risk of dependence and side effects. If you experience unusual symptoms or need to stop taking it, speak to your doctor or pharmacist.
