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Package leaflet: Information for the user
Palladone® SR

2 mg, 4 mg, 8 mg, 16 mg and
24 mg prolonged-release capsules
Hydromorphone hydrochloride

Read all of this leaflet carefully before you start taking this medicine.
• Keep this leaflet. You may need to read it again.
• If you have any further questions, ask your doctor or pharmacist.
• This medicine has been prescribed for you. Do not pass it on to others. It may
harm them, even if their symptoms are the same as yours.
• 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.
In this leaflet:
1. What Palladone SR capsules are and
what they are used for
2. Before you take Palladone SR
3. How to take Palladone SR capsules
4. Possible side effects
5. How to store Palladone SR capsules
6. Further information

1. What Palladone SR capsules are
and what they are used for
These capsules have been prescribed
for you to relieve severe pain over a
period of 12 hours. They contain the
active ingredient hydromorphone which
belongs to a group of medicines called
strong analgesics or ‘painkillers’.

2. Before you take Palladone SR
Do not take Palladone SR capsules if you:
• are allergic (hypersensitive) to
hydromorphone or any of the other
ingredients of the capsules (see section 6
‘Further Information’);
• have a condition where you breathe
more slowly or weakly than expected
(respiratory depression);
• have a severe pain in your abdomen;
• have liver problems;
• have a condition where the small bowel
does not work properly (paralytic ileus);
• are taking a type of medicine known as a
monoamine oxidase inhibitor (examples
include tranylcypromide, phenelzine,
isocarboxazid, moclobemide and
linezolid), or you have taken this type of
medicine in the last two weeks;
• have a severe headache or feel sick due to
a head injury or increased pressure in your
skull (for instance due to brain disease).
This is because the capsules may make
symptoms worse or hide the extent of a
head injury;
• suffer from seizures, fits or convulsions;
• are or have ever been addicted to alcohol;
• are under 12 years of age.
If you are going to have an operation, please
tell the doctor at the hospital that you are
taking these capsules.

Take special care with Palladone SR
Before treatment with these capsules tell
your doctor or pharmacist if you:
• have breathing problems, such as
severely impaired pulmonary function,
chronic obstructive airways disease
or reduced respiratory reserve. Your
doctor will have told you if you have
any of these conditions. Symptoms may
include breathlessness and coughing;
• have a mental disorder as a result of an
infection (toxic psychosis);
• have inflammation of the pancreas
(which causes severe pain in the
abdomen and back);
• have an under-active thyroid gland
• have low blood pressure (hypotension);
• have kidney problems;
• have poor adrenal gland function (your
adrenal gland is not working properly
which may cause symptoms including
weakness, weight loss, dizziness, feeling
or being sick);
• have prostate problems;
• are suffering from shock (this may make
you suddenly feel very light-headed,
faint, cold or clammy and look pale);
• are addicted to drugs or have ever been
addicted to either alcohol or drugs;
• have withdrawal symptoms such as
agitation, anxiety, shaking or sweating
upon stopping alcohol or drugs.

Very rarely you may experience
increased sensitivity to pain
despite the fact that you are taking
increasing doses of these capsules
(hyperalgesia). Your doctor will
decide whether you need a change in
dose or a change in strong analgesic
Taking other medicines
Please tell your doctor or pharmacist
if you are taking or have recently
taken any other medicines, including
medicines obtained without a
prescription. If you take these
capsules with some other medicines,
the effect of the capsules or the other
medicine may be changed.
These capsules must not be used
together with a type of medicine
known as a monoamine oxidase
inhibitor, or if you have taken
this type of medicine in the last
two weeks (see section 2 ‘Do not
Tell your doctor or pharmacist if you
are taking:
• medicines to help you sleep or stay
calm (for example tranquillisers,
hypnotics or sedatives);
• medicines known as barbiturates to
either treat fits or to help you sleep;
• medicines to stop you feeling or
being sick;

• medicines to treat depression;
• medicines to treat psychiatric
or mental disorders (such as
• other strong analgesics or ‘painkillers’.
Also tell your doctor if you have recently
been given an anaesthetic.
Taking Palladone SR capsules with
Drinking alcohol whilst taking
Palladone SR capsules may make you
feel more sleepy or increase the risk
of serious side effects such as shallow
breathing with a risk of stopping
breathing, and loss of consciousness. It is
recommended not to drink alcohol whilst
you’re taking Palladone SR.
Pregnancy and breastfeeding
Do not take these capsules if you are
pregnant or breastfeeding.
Ask your doctor or pharmacist for advice
before taking any medicine.
Driving and using machines
These capsules may cause a number of
side effects such as drowsiness which
could affect your ability to drive or use
machinery (see section 4 for a full list
of side effects). These are usually most
noticeable when you first start taking the
capsules, or when changing to a higher
dose. If you are affected you should not
drive or use machinery.

3. How to take Palladone SR
Always take the capsules exactly as
your doctor has told you. The label on
your medicine will tell you how many
capsules to take and how often.
Adults and children over 12 years of
The usual starting dose is one 4 mg
capsule every 12 hours. However, your
doctor will prescribe the dose required
to treat your pain. If you find that you
are still in pain whilst taking these
capsules discuss this with your doctor.
Children under 12 years of age
Children under 12 years of age should
not take the capsules.
Do not exceed the dose recommended
by your doctor. You should check with
your doctor or pharmacist if you are not
Swallow your capsules whole with a
glass of water. If you prefer, you can
open the capsules and sprinkle the
contents on to cold soft food, such
as yoghurt. You must only take the
capsules by mouth. Do not crush
or chew the capsule or the capsule

Palladone SR capsules are designed
to work properly over 12 hours. If
the capsule contents are crushed,
dissolved or chewed, the entire
12-hour dose may be absorbed
rapidly into your body. The capsule
contents should never be injected.
This can be dangerous, causing
serious problems such as an
overdose, which may be fatal.
You should take your capsules every
12 hours. For instance, if you take a
capsule at 8 o’clock in the morning,
you should take your next capsule at
8 o’clock in the evening.
If you take more Palladone SR
capsules than you should or if
someone accidentally swallows
your capsules
Call your doctor or hospital straight
away. People who have taken an
overdose may feel very sleepy,
sick or dizzy. They may also have
breathing difficulties leading to
unconsciousness or even death and
may need emergency treatment in
hospital. When seeking medical
attention make sure that you take this
leaflet and any remaining capsules
with you to show the doctor.

If you forget to take Palladone SR
If you remember within 4 hours of the
time your capsule was due, take your
capsule straight away. Take your next
capsule at your normal time. If you are
more than 4 hours late, please call your
doctor or pharmacist for advice. Do
not take a double dose to make up for a
forgotten capsule.
If you stop taking Palladone SR
You should not stop taking these
capsules unless your doctor tells you
to. If you want to stop taking your
capsules, discuss this with your doctor
first. They will tell you how to do this,
usually by reducing the dose gradually
so you do not experience unpleasant
side effects. Withdrawal symptoms
such as agitation, anxiety, shaking or
sweating may occur if you suddenly
stop taking these capsules.
If you have any further questions on the
use of this medicine, ask your doctor or

4. Possible side effects
Like all medicines, these capsules can
cause side effects, although not everybody
gets them.
All medicines can very rarely cause
allergic reactions (hypersensitivity
reactions), The incidence of serious allergic
reactions (anaphylactic reactions) is not
known. Tell your doctor immediately if
you get any sudden wheeziness, difficulties
in breathing, swelling of the eyelids, face
or lips, mouth or throat, or any rash or
itching especially those covering your
whole body.
The most serious side effect is a condition
where you breathe more slowly or weakly
than expected (respiratory depression).
As with all strong painkillers, there is a
risk you may become addicted or reliant on
these capsules.
Common side effects (Probably affecting
more than 1 in 100 people taking these
• Constipation (your doctor can prescribe
a laxative to overcome this problem).
• Loss of appetite, abdominal pain or
• Feeling or being sick (this should
normally wear off after a few days,
however your doctor can prescribe an
anti-sickness medicine if it continues to
be a problem).

• Drowsiness (this is most likely when
you first start taking your capsules or
when your dose is increased, but it
should wear off after a few days).
• Difficulty in sleeping, feeling more
sleepy that usual.
• Low blood pressure.
• Dry mouth.
• Anxiety, confusion.
• A feeling of unusual weakness,
confusion or dizziness.
• Rash or itchy skin.
• Sweating.
• Difficulty in passing urine.
Uncommon side effects (Probably
affecting fewer than 1 in 100 people
taking these capsules)
• A condition where the small bowel
(part of your gut) does not work
properly (paralytic ileus), abdominal
pain or discomfort, diarrhoea,
changes in tasteSwelling of the hands,
ankles or feet.
• Tingling or numbness.
• A fast heart beat
• A feeling of extreme happiness, mood
changes or agitation.
• Hallucinations, depression,
• Shortness of breath.
• Blurred vision or a reduction in size
of the pupils in the eye.
• Uncontrolled muscle movements,
muscle spasms.

An increase in sensitivity to pain.
Seizures, fits or convulsions.
A need to take increasingly higher doses
to obtain the same level of pain relief

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
5. How to store Palladone SR capsules
Keep out of the reach and sight of children.
Do not use any capsules after the expiry date
which is stated on the blister and carton after
EXP. The expiry date refers to the last day of
that month.
Do not store your capsules above 25ºC. Store
in the original package.
Do not take your capsules if they are broken
or crushed as this can be dangerous and can
cause serious problems such as overdose.
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. Further information
What Palladone SR capsules contain
The active ingredient is hydromorphone
hydrochloride. Each capsule contains
2 mg, 4 mg, 8 mg, 16 mg or 24 mg of
hydromorphone hydrochloride.
The other ingredients are:
• Microcrystalline cellulose
• Hypromellose
• Ethylcellulose
• Colloidal anhydrous silica
• Dibutyl sebacate
• Gelatin
• Sodium dodecyl sulphate
• Shellac
• Propylene glycol
• Titanium dioxide (E171)
• Iron oxide (E172)
The capsules also contain the following
2 mg capsule – Quinoline yellow
4 mg capsule – Erythrosine (E127) and
indigo carmine (E132)
8 mg capsule – Erythrosine (E127)
16 mg capsule – Iron oxide (E172)
24 mg capsule – Indigo carmine (E132)

What Palladone SR capsules look like and the contents of the pack
The capsules have a hard gelatin shell containing spherical pellets. The capsules are
marked HCR followed by the strength (e.g. 2, 4 etc.) and are coloured as follows:
2 mg – yellow/white, 4 mg – pale blue/clear, 8 mg – pink/clear, 16 mg – brown/clear,
24 mg – dark blue/clear.
In each box there are 56 capsules.
Marketing Authorisation Holder and Manufacturer
The capsules are made by Bard Pharmaceuticals Limited for the marketing
authorisation holder Napp Pharmaceuticals Limited, both at Cambridge Science Park,
Milton Road, Cambridge CB4 0GW, UK.

This leaflet is also available in large print, Braille or as an
audio CD. To request a copy, please call the RNIB Medicine
Information line (free of charge) on:

0800 198 5000

You will need to give details of the product name and
reference number.
These are as follows:
Product name: Palladone SR prolonged-release capsules
Reference number: 16950/0051
This leaflet was last revised in October 2010
® Palladone and the NAPP device (logo) are Registered Trade Marks.
© 2011 Napp Pharmaceuticals Limited

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Source: Medicines and Healthcare Products Regulatory Agency

Disclaimer: Every effort has been made to ensure that the information provided here is accurate, up-to-date and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. This information has been compiled for use by healthcare practitioners and consumers in the United States. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective or appropriate for any given patient. If you have questions about the substances you are taking, check with your doctor, nurse or pharmacist.