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Diamorphine Hydrochloride tablets 10 mg – patient leaflet, side effects, dosage

Last updated: · Text from the MHRA, as of · About this document

Medicine status: Controlled drug (Schedule 2) Not available Details

Medicine strength:
10 mg
Contains active substance:

Patient leaflet - Diamorphine Hydrochloride tablets 10 mg

1. What Diamorphine Hydrochloride Tablets are and what they are used for

Diamorphine is an alkaloid with powerful pain relieving properties.

These tablets are used for the relief of severe pain associated with cancer, heart attack, chest pain and pain associated with a condition caused by excess fluid in the lungs.

2. What you need to know before you take Diamorphine Hydrochloride Tablets

Do not take Diamorphine Hydrochloride Tablets if you:

  • are allergic (hypersensitive) to Diamorphine or any of the ingredients of this medicine (listed in section 6
  • suffer from asthma, shallow breathing and other breathing difficulties
  • are suffering from severe headaches or have suffered a head injury
  • suffer from alcoholism

  • are suffering from a problem that could cause paralysis of the small intestine (paralytic ileus)
  • are having an asthma attack
  • have been told you are suffering from a condition known as delayed gastric emptying, the symptoms of which include heartburn, feeling sick or being sick and feeling full quickly whilst eating
  • suffer from a tumour of the adrenal gland known as phaeochromocytoma.

Talk to your doctor or pharmacist or nurse before taking Diamorphine Hydrochloride Tablets

Tell your doctor if:

  • you have low blood pressure
  • you have any liver problems
  • you have any kidney problems
  • you have any prostate problems
  • you have an under active thyroid
  • you suffer from a convulsive disorder (fits) such as epilepsy
  • you are about to have an operation
  • you are pregnant or breast-feeding
  • you are suffering from severe diarrhoea
  • you are suffering from mental health problems
  • you have abnormal curvature of the spine
  • your breathing or heartbeat are unusually slow or you feel unexpectedly sleepy or faint
  • you have been told you suffer from a severe heart problem known as cor pulmonale
  • you are elderly or ill
  • you suffer from urethral stricture and severe inflammatory bowel disease.

    Other medicines and Diamorphine Hydrochloride Tablets:

    Please tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines, including those obtained without prescription.

    Diamorphine Hydrochloride Tablets must not be used with drugs used to treat severe depression, such as phenelzine or moclobemide, or if you are within 2 weeks of discontinuing them.

    These drugs are known as Monoamine Oxidase Inhibitors (MAOI’s).

    Other medicines which may interact with Diamorphine Tablets include:

    • medicines for sleeping problems and anxiety, such as chloral, diazepam, and barbiturates
    • mexiletine (a drug used to treat irregular heart rhythms)
    • alcohol.

Concomitant use of Diamorphine Hydrochloride

Tablets and sedative medicines such as benzodiazepines or related drugs increases the risk of drowsiness, difficulties in breathing (respiratory depression), coma and may be life-threatening. Because of this, concomitant use should only be considered when other treatment options are not possible.

However, if your doctor does prescribe Diamorphine Hydrochloride Tablets together with sedative medicines the dose and duration of concomitant treatment should be limited by your doctor. Please tell your doctor about all sedative medicines you are taking, and follow your doctor’s dose recommendation closely. It could be helpful to inform friends or relatives to be aware of the signs and symptoms stated above. Contact your doctor when experiencing such symptoms.

Pregnancy & breast-feeding:

If you are pregnant, or breast feeding, think you may be pregnant or planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine.

Driving and using machines:

This medicine can affect your ability to drive and operate machinery. Do not drive or operate machinery if you feel drowsy or cannot think clearly. This medicine can affect your ability to drive and operate machinery as it may make you sleepy or dizzy.

  • Do not drive while taking this medicine until you know how it affects you.
  • It is an offence to drive if this medicine affects your ability to drive.
  • However, you would not be committing an offence if:

    • The medicine has been prescribed to treat a medical or dental problem and
    • You have taken it according to the instructions given by the prescriber or in the information provided with the medicine and
    • It was not affecting your ability to drive safely. Talk to your doctor or pharmacist if you are not sure whether it is safe for you to drive while taking this medicine.

Diamorphine Hydrochloride contains Sucrose and Lactose:

This medicine contains sucrose and lactose. If you have been told by your doctor that you have an intolerance to some sugars (sucrose), contact your doctor before taking this medicinal product

3. How to take Diamorphine Hydrochloride Tablets

Always take this medicine exactly as your doctor or pharmacist has told you. Check with your doctor or pharmacist if you are not sure.

The tablets should be swallowed with water, and the dose recommended should not be repeated more than every four hours. The tablet can be divided into equal doses.

This medicine is for oral use

Adults and children over 12 years:

Usual starting dose is 5-10mg (half a tablet to 1 whole tablet) every 4 hours. This may be increased, on the instruction of your doctor, if needed. The elderly: Use with caution. A starting dose lower than the normal adult dose should be used. Children under 12 years: Not recommended. If you forget to take Diamorphine Hydrochloride Tablets

If you have missed a dose take it as soon as you remember unless it is nearly time for your next dose. Then continue your normal dose times. Do not take a double dose to make up for a forgotten tablet. If you take more Diamorphine Hydrochloride Tablets than you should:

If you believe that you have taken, or been given, too many tablets or if you feel dizzy, have trouble breathing or develop pin point pupils consult your doctor or nurse immediately. If you cannot do this go, but do not drive, to your nearest accident and emergency unit taking the tablet bottle with you. If you stop taking Diamorphine Hydrochloride Tablets

You should not stop taking Diamorphine Hydrochloride Tablet until advised to do so by your doctor. If you stop treatment too suddenly you may experience symptoms of withdrawal such as stomach pains, feeling sick and feeling anxious. Your doctor will advise you how to stop your treatment with Diamorphine Hydrochloride Tablets. If you have any further questions on the use of this medicine, ask your doctor, pharmacist or nurse.

4. Possible side effects

Like all medicines, Diamorphine Hydrochloride Tablets can cause side effects but not everybody gets them. Repeated use of diamorphine can result in tolerance and addiction

If any of the following symptoms occur contact your doctor or nearest accident and emergency department immediately. These are symptoms of a serious allergic reaction.

  • sudden wheeziness and tightness of chest
  • swelling of eyelids, face or lips
  • skin lumps or hives
  • skin rash (red spots), itchiness, fever
  • collapse

If any of the following symptoms occur contact your doctor or nearest accident and emergency department immediately. These are symptoms of a heart attack.

  • sudden chest pains
  • shortness of breath
  • sweating
  • anxiety

Other side effects that may occur include:

  • hallucinations (seeing things that aren’t real)
  • confusion
  • changes in mood
  • a feeling of being unwell
  • headaches
  • a feeling of dizziness or spinning
  • sweating
  • drowsiness
  • reduced blood pressure (you may feel dizzy when rising from a seated position)
  • pin-point pupils
  • an unusually fast or slow heartbeat
  • palpitations (an irregular heart rhythm or missed beats)
  • facial flushing
  • constipation
  • feeling sick (nausea)
  • being sick (vomiting)
  • dry mouth
  • lower abdomen spasms
  • rashes and itching
  • cramps
  • difficulty sleeping
  • breathing difficulties
  • a reduced sex drive

    • difficulty getting or maintaining an erection
    • difficulty passing urine
    • a feeling of being very cold
    • loss of appetite
    • changes in the way things taste
    • fainting
    • feeling weak

If any of the side effects become serious, or if you notice any side effects not listed in this leaflet, please tell your doctor or pharmacist. Reporting of side effects

If you get any side effects, talk to your doctor or pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme Website at: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App

Store. By reporting side effects you can help provide more information on the safety of this medicine.

5. How to store Diamorphine Hydrochloride Tablets

Keep this medicine out of the sight and reach of children.

Do not use this medicine after the expiry date which is stated on the carton after EXP. The expiry date refers to the last day of that month. Keep the glass bottle in the outer carton in order to protect from light. Keep the container tightly closed.

Do not store above 30°C

Do not use this medicine if you notice the tablets are discoloured or show signs of discolouration in any way.

Medicines should not be disposed of via wastewater or household waste. Ask your pharmacist how to dispose of medicines no longer required. These measures will help to protect the environment.

6. Contents of the pack and other information

What Diamorphine Hydrochloride Tablets contain: Active ingredient: Diamorphine Hydrochloride 10mg per tablet

Other ingredients: sucrose, lactose and magnesium stearate

What Diamorphine Hydrochloride Tablets look like and the contents of the pack:

Diamorphine Hydrochloride Tablets are white, uncoated tablets with a single break line. Diamorphine Hydrochloride Tablets 10mg are licensed to be available in pack sizes of 100 tablets per amber glass bottle.

Marketing Authorisation Holder:

Aurum Pharmaceuticals Ltd Bampton Road

Harold Hill

Romford

Essex

RM3 8UG

United Kingdom

Manufacturer:

Dales Pharmaceuticals Ltd

Snaygill Industrial Estate

Keighley Road

Skipton

North Yorkshire

BD23 2RW

United Kingdom

Product Licence No.: PL 12064/0001 Date of revision: August 2018

Read all of this leaflet carefully before you start taking this medicine because it contains important information for you.

  • Keep this leaflet. You may need to read it again.
  • If you have any further questions, please ask your doctor or pharmacist or nurse.
  • This medicine has been prescribed for you only. Do not pass it onto others. It may harm them, even if their signs of illness are the same as yours.
  • If you get any of the side effects, talk to your doctor or pharmacist or nurse. This includes any possible side effects not listed in this leaflet. See section 4.

PACKAGE LEAFLET: INFORMATION FOR THE USER D04324

Diamorphine Hydrochloride

10mg Tablets

Diamorphine Hydrochloride

Continued overleaf

D04323

Diamorphine Hydrochloride 10mg PIL Tablets
140 x 280mm
22/06/18NF
28/06/18NF
15/08/18NF

me and you

1 Blighs Road, Sevenoaks, Kent, TN13 1DA, UK t: +44 (0) 1732 749 748 e: nick@meandyou.co.uk

www.meandyou.co.uk

About this document

Source: MHRA - Medicines and Healthcare products Regulatory Agency (products.mhra.gov.uk) · Marketing authorisation: PL 12064/0001

Last revision stated in the text: August 2018 · MHRA data as of 13 October 2026

Found a mistake? Tell us on the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Facts about Diamorphine Hydrochloride tablets 10 mg

Controlled drug
Yes, Schedule 2 of the Misuse of Drugs Regulations?
  • Controlled drugs are medicines that UK law controls more strictly because they can be misused or cause dependence. The Misuse of Drugs Regulations 2001 divide them into 5 schedules: schedule 1 has the strictest rules, schedule 5 the lightest.
  • Schedule 2 is the strictest group of prescribed medicines, for example strong opioid painkillers and medicines for ADHD.
  • A prescription is valid for 28 days and usually covers up to 30 days of treatment. It cannot be issued as a repeat dispensing prescription.
  • When you collect it, the pharmacist must check whether you are the patient and may ask for ID.
  • Travelling abroad: you can usually carry up to 3 months' supply. Take your prescription or a letter from your doctor to show it is yours, and check the rules of the country you are going to (GOV.UK).
  • Never give it to anyone else.
Active substance Diamorphine
Strength 10 mg
Pharmaceutical form Oral tablet
The tablet can be divided into equal doses.
How is it taken Oral
Excipients Sucrose, Lactose, Magnesium stearate
Is it available? No, it is listed as not available (NHS Dictionary of Medicines and Devices – not a record of current supplies)
Shelf life 24 months
Storage Store below 30°C.
Keep the glass bottle in the outer carton in order to protect from light. Keep this medicine out of the sight and reach of children.
Drug group (ATC)
  1. N Nervous system drugs
    1. N07 Other nervous system drugs
      1. N07B Drugs used in addictive disorders
        1. N07BC Drugs used in opioid dependence
          1. N07BC06 diamorphine
Marketing authorisation PL 12064/0001 (first authorised 15 October 1992)
Marketing authorisation holder Aurum Pharmaceuticals Ltd
Codes BNF 04070200

Sources: the MHRA product information (products.mhra.gov.uk) and the NHS Dictionary of Medicines and Devices (dm+d), release 10.1.0 of 12 October 2026, NHS Business Services Authority. Contains public sector information licensed under the Open Government Licence v3.0.