Advanced search

Report side effect

Report a suspected side effect or falsified product to the MHRA Yellow Card scheme.
Go to {yellow_card_logo} site
{arrow_up} Back to top

WEZENLA 90 mg solution for injection in pre-filled pen {equilateral_black_triangle}

Active Ingredient:
ATC code: 
L04AC05
{info_black}
About Medicine
The Patient Information Leaflet (PIL) is the leaflet included in the pack with a medicine.
{info_black}
Last updated on emc: 24 Apr 2025

{equilateral_black_triangle} This medicinal product is subject to additional monitoring. This will allow quick identification of new safety information.

Below is a text only representation of the Patient Information Leaflet (ePIL).

The text only version may be available in large print, Braille or audio CD. For further information call emc accessibility on {phone} 0800 198 5000. The product code(s) for this leaflet is: PLGB 13832/0097.

WEZENLA 45 mg and 90 mg solution for injection in pre-filled pen

Package leaflet: Information for the user

WEZENLA 45 mg solution for injection in pre-filled pen

WEZENLA 90 mg solution for injection in pre-filled pen

ustekinumab

▼This medicine is subject to additional monitoring. This will allow quick identification of new safety information. You can help by reporting any side effects you may get. See the end of section 4 for how to report side effects.

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

This leaflet has been written for the person taking the medicine. If you are the parent or caregiver who will give WEZENLA to a child, please read this information carefully.

  • 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 only. Do not pass it on to others. It may harm them, even if their signs of illness are the same as yours.
  • If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. See section 4.

What is in this leaflet

1. What WEZENLA is and what it is used for
2. What you need to know before you use WEZENLA
3. How to use WEZENLA
4. Possible side effects
5. How to store WEZENLA
6. Contents of the pack and other information

1. What WEZENLA is and what it is used for
What WEZENLA is

WEZENLA contains the active substance ‘ustekinumab’, a monoclonal antibody. Monoclonal antibodies are proteins that recognise and bind specifically to certain proteins in the body.

WEZENLA belongs to a group of medicines called ‘immunosuppressants’. These medicines work by weakening part of the immune system.

What WEZENLA is used for

WEZENLA is used to treat the following inflammatory diseases:

  • Plaque psoriasis - in adults and children aged 6 years and older
  • Psoriatic arthritis - in adults
  • Moderate to severe Crohn’s disease - in adults
  • Moderate to severe ulcerative colitis - in adults

Plaque psoriasis

Plaque psoriasis is a skin condition that causes inflammation affecting the skin and nails. WEZENLA will reduce the inflammation and other signs of the disease.

WEZENLA is used in adults with moderate to severe plaque psoriasis, who cannot use ciclosporin, methotrexate or phototherapy, or where these treatments did not work.

WEZENLA is used in children and adolescents aged 6 years and older with moderate to severe plaque psoriasis who are unable to tolerate phototherapy or other systemic therapies or where these treatments did not work.

Psoriatic arthritis

Psoriatic arthritis is an inflammatory disease of the joints, usually accompanied by psoriasis. If you have active psoriatic arthritis you will first be given other medicines. If you do not respond well enough to these medicines, you may be given WEZENLA to:

  • Reduce the signs and symptoms of your disease.
  • Improve your physical function.
  • Slow down the damage to your joints.

Crohn’s disease

Crohn’s disease is an inflammatory disease of the bowel. If you have Crohn’s disease you will first be given other medicines. If you do not respond well enough or are intolerant to these medicines, you may be given WEZENLA to reduce the signs and symptoms of your disease.

Ulcerative colitis

Ulcerative colitis is an inflammatory disease of the bowel. If you have ulcerative colitis you will first be given other medicines. If you do not respond well enough or are intolerant to these medicines, you may be given WEZENLA to reduce the signs and symptoms of your disease.

2. What you need to know before you use WEZENLA
Do not use WEZENLA
  • If you are allergic to ustekinumab or any of the other ingredients of this medicine (listed in section 6).
  • If you have an active infection which your doctor thinks is important.

If you are not sure if any of the above applies to you, talk to your doctor or pharmacist before using WEZENLA.

Warnings and precautions

Talk to your doctor or pharmacist before using WEZENLA. Your doctor will check how well you are before each treatment. Make sure you tell your doctor about any illness you have before each treatment. Also tell your doctor if you have recently been near anyone who might have tuberculosis. Your doctor will examine you and do a test for tuberculosis, before you have WEZENLA. If your doctor thinks you are at risk of tuberculosis, you may be given medicines to treat it.

Look out for serious side effects

WEZENLA can cause serious side effects, including allergic reactions and infections. You must look out for certain signs of illness while you are taking WEZENLA. See ‘Serious side effects’ in section 4 for a full list of these side effects.

Before you use WEZENLA tell your doctor:

  • If you ever had an allergic reaction to ustekinumab. Ask your doctor if you are not sure.
  • If you have ever had any type of cancer – this is because immunosuppressants like WEZENLA weaken part of the immune system. This may increase the risk of cancer.
  • If you have been treated for psoriasis with other biologic medicines (a medicine produced from a biological source and usually given by injection) – the risk of cancer may be higher.
  • If you have or have had a recent infection.
  • If you have any new or changing lesions within psoriasis areas or on normal skin.
  • If you are having any other treatment for psoriasis and/or psoriatic arthritis – such as another immunosuppressant or phototherapy (when your body is treated with a type of ultraviolet (UV) light). These treatments may also weaken part of the immune system. Using these therapies together with WEZENLA has not been studied. However, it is possible it may increase the chance of diseases related to a weaker immune system.
  • If you are having or have ever had injections to treat allergies – it is not known if WEZENLA may affect these.
  • If you are 65 years of age or over – you may be more likely to get infections.

If you are not sure if any of the above applies to you, talk to your doctor or pharmacist before using WEZENLA.

Some patients have experienced lupus-like reactions including skin lupus or lupus-like syndrome during treatment with ustekinumab. Talk to your doctor right away if you experience a red, raised, scaly rash sometimes with a darker border, in areas of the skin that are exposed to the sun or with joint pains.

Heart attack and strokes

Heart attack and strokes have been observed in a study in patients with psoriasis treated with ustekinumab. Your doctor will regularly check your risk factors for heart disease and stroke in order to ensure that they are appropriately treated. Seek medical attention right away if you develop chest pain, weakness or abnormal sensation on one side of your body, facial droop, or speech or visual abnormalities.

Children and adolescents

WEZENLA is not recommended for use in children with psoriasis under 6 years of age, or for use in children under 18 years of age with psoriatic arthritis, Crohn’s disease, or ulcerative colitis because it has not been studied in this age group.

Other medicines, vaccines and WEZENLA

Tell your doctor or pharmacist:

  • If you are taking, have recently taken or might take any other medicines.
  • If you have recently had or are going to have a vaccination. Some types of vaccines (live vaccines) should not be given while using WEZENLA.
  • If you received WEZENLA while pregnant, tell your baby’s doctor about your WEZENLA treatment before the baby receives any vaccine, including live vaccines, such as the BCG vaccine (used to prevent tuberculosis). Live vaccines are not recommended for your baby in the first twelve months after birth if you received WEZENLA during the pregnancy unless your baby’s doctor recommends otherwise.

Pregnancy and breast-feeding
  • It is preferable to avoid the use of WEZENLA in pregnancy. The effects of WEZENLA in pregnant women are not known. If you are a woman of childbearing potential, you are advised to avoid becoming pregnant and must use adequate contraception while using WEZENLA and for at least 15 weeks after the last WEZENLA treatment.
  • Talk to your doctor if you are pregnant, think you may be pregnant or are planning to have a baby.
  • WEZENLA can pass across the placenta to the unborn baby. If you received WEZENLA during your pregnancy, your baby may have a higher risk for getting an infection.
  • It is important that you tell your baby’s doctors and other health care professionals if you received WEZENLA during your pregnancy before the baby receives any vaccine. Live vaccines such as the BCG vaccine (used to prevent tuberculosis) are not recommended for your baby in the first twelve months after birth if you received WEZENLA during the pregnancy unless your baby’s doctor recommends otherwise.
  • Ustekinumab may pass into breast milk in very small amounts. Talk to your doctor if you are breast-feeding or are planning to breast-feed. You and your doctor should decide if you should breast-feed or use WEZENLA - do not do both.

Driving and using machines

WEZENLA has no or negligible influence on the ability to drive and use machines.

3. How to use WEZENLA

WEZENLA is intended for use under the guidance and supervision of a doctor experienced in treating conditions for which WEZENLA is intended.

Always use this medicine exactly as your doctor has told you. Check with your doctor if you are not sure. Talk to your doctor about when you will have your injections and follow-up appointments.

How much WEZENLA is given

Your doctor will decide how much WEZENLA you need to use and for how long.

Adults aged 18 years or older

Psoriasis or Psoriatic Arthritis

  • The recommended starting dose is 45 mg WEZENLA. Patients who weigh more than 100 kilograms (kg) may start on a dose of 90 mg instead of 45 mg.
  • After the starting dose, you will have the next dose 4 weeks later, and then every 12 weeks. The following doses are usually the same as the starting dose.

Crohn’s disease or ulcerative colitis

  • During treatment, the first dose of approximately 6 mg/kg WEZENLA will be given by your doctor through a drip in a vein in your arm (intravenous infusion). After the starting dose, you will receive the next dose of 90 mg WEZENLA after 8 weeks, then every 12 weeks thereafter by an injection under the skin (‘subcutaneously’).
  • In some patients, after the first injection under the skin, 90 mg WEZENLA may be given every 8 weeks. Your doctor will decide when you should receive your next dose.

Children and adolescents aged 6 years or older

Psoriasis

  • The doctor will work out the right dose for you, including the amount (volume) of WEZENLA to be injected to give the right dose. The right dose for you will depend on your body weight at the time each dose is given.
  • The pre-filled pen has not been studied in children 6 to 11 years of age and is not recommended for use in children aged 6 to 11 years old.
  • A 45 mg vial is available for children who need to receive less than the full 45 mg dose.
  • If you weigh less than 60 kg, the recommended dose is 0.75 mg of WEZENLA per kg body weight.
  • If you weigh 60 kg to 100 kg, the recommended dose is 45 mg WEZENLA.
  • If you weigh more than 100 kg, the recommended dose is 90 mg WEZENLA.
  • After the starting dose, you will have the next dose 4 weeks later, and then every 12 weeks.

How WEZENLA is given
  • WEZENLA is given as an injection under the skin (‘subcutaneously’). At the start of your treatment, medical or nursing staff may inject WEZENLA.
  • However, you and your doctor may decide that you may inject WEZENLA yourself. In this case you will receive training on how to inject WEZENLA yourself.
  • For instructions on how to inject WEZENLA, see ‘Instructions for use’ at the end of this leaflet.

Talk to your doctor if you have any questions about giving yourself an injection.

If you use more WEZENLA than you should

If you have used or been given too much WEZENLA, talk to a doctor or pharmacist straight away. Always have the outer carton of the medicine with you, even if it is empty.

If you forget to use WEZENLA

If you forget a dose, contact your doctor or pharmacist. Do not take a double dose to make up for a forgotten dose.

If you stop using WEZENLA

It is not dangerous to stop using WEZENLA. However, if you stop, your symptoms may come back.

If you have any further questions on the use of this medicine, ask your doctor or pharmacist.

4. Possible side effects

Like all medicines, this medicine can cause side effects, although not everybody gets them.

Serious side effects

Some patients may have serious side effects that may need urgent treatment.

Allergic reactions – these may need urgent treatment. Tell your doctor or get emergency medical help straight away if you notice any of the following signs.

  • Serious allergic reactions (‘anaphylaxis’) are rare in people taking ustekinumab (may affect up to 1 in 1,000 people). Signs include:
    • difficulty breathing or swallowing
    • low blood pressure, which can cause dizziness or light-headedness
    • swelling of the face, lips, mouth or throat.
  • Common signs of an allergic reaction include skin rash and hives (these may affect up to 1 in 100 people).

In rare cases, allergic lung reactions and lung inflammation have been reported in patients who receive ustekinumab. Tell your doctor right away if you develop symptoms such as cough, shortness of breath, and fever.

If you have a serious allergic reaction, your doctor may decide that you should not use WEZENLA again.

Infections – these may need urgent treatment. Tell your doctor straight away if you notice any of the following signs.

  • Infections of the nose or throat and common cold are common (may affect up to 1 in 10 people).
  • Infections of the chest are uncommon (may affect up to 1 in 100 people).
  • Inflammation of tissue under the skin (‘cellulitis’) is uncommon (may affect up to 1 in 100 people).
  • Shingles (a type of painful rash with blisters) are uncommon (may affect up to 1 in 100 people).

WEZENLA may make you less able to fight infections. Some infections could become serious and may include infections caused by viruses, fungi, bacteria (including tuberculosis), or parasites, including infections that mainly occur in people with a weakened immune system (opportunistic infections). Opportunistic infections of the brain (encephalitis, meningitis), lungs, and eye have been reported in patients receiving treatment with ustekinumab.

You must look out for signs of infection while you are using WEZENLA. These include:

  • fever, flu-like symptoms, night sweats, weight loss
  • feeling tired or short of breath; cough which will not go away
  • warm, red and painful skin, or a painful skin rash with blisters
  • burning when passing water
  • diarrhoea
  • visual disturbance or vision loss
  • headache, neck stiffness, light sensitivity, nausea or confusion.

Tell your doctor straight away if you notice any of these signs of infection. These may be signs of infections such as chest infections or skin infections or shingles or opportunistic infections that could have serious complications. Tell your doctor if you have any kind of infection that will not go away or keeps coming back. Your doctor may decide that you should not use WEZENLA until the infection goes away. Also tell your doctor if you have any open cuts or sores as they might get infected.

Shedding of skin – increase in redness and shedding of skin over a larger area of the body may be symptoms of erythrodermic psoriasis or exfoliative dermatitis, which are serious skin conditions. You should tell your doctor straight away if you notice any of these signs.

Other side effects

Common side effects (may affect up to 1 in 10 people):

  • Diarrhoea
  • Nausea
  • Vomiting
  • Feeling tired
  • Feeling dizzy
  • Headache
  • Itching (‘pruritus’)
  • Back, muscle or joint pain
  • Sore throat
  • Redness and pain where the injection is given
  • Sinus infection

Uncommon side effects (may affect up to 1 in 100 people):

  • Tooth infections
  • Vaginal yeast infection
  • Depression
  • Blocked or stuffy nose
  • Bleeding, bruising, hardness, swelling and itching where the injection is given
  • Feeling weak
  • Drooping eyelid and sagging muscles on one side of the face (‘facial palsy’ or ‘Bell’s palsy’), which is usually temporary
  • A change in psoriasis with redness and new tiny, yellow or white skin blisters, sometimes accompanied by fever (pustular psoriasis)
  • Peeling of the skin (skin exfoliation)
  • Acne

Rare side effects (may affect up to 1 in 1,000 people):

  • Redness and shedding of skin over a larger area of the body, which may be itchy or painful (exfoliative dermatitis). Similar symptoms sometimes develop as a natural change in the type of psoriasis symptoms (erythrodermic psoriasis)
  • Inflammation of small blood vessels, which can lead to a skin rash with small red or purple bumps, fever or joint pain (vasculitis)

Very rare side effects (may affect up to 1 in 10,000 people):

  • Blistering of the skin that may be red, itchy, and painful (Bullous pemphigoid)
  • Skin lupus or lupus-like syndrome (red, raised scaly rash on areas of the skin exposed to the sun possibly with joint pains)

Reporting of side effects

If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly (see details below). By reporting side effects you can help provide more information on the safety of this medicine.

Yellow Card Scheme
Website: www.mhra.gov.uk/yellowcard

or search for MHRA Yellow Card in the Google Play or Apple App Store.

5. How to store WEZENLA
  • Keep this medicine out of the sight and reach of children.
  • Store in a refrigerator (2°C – 8°C). Do not freeze.
  • Keep the pre-filled pen in the outer carton in order to protect from light.
  • If needed, individual WEZENLA pre-filled pens may also be stored at room temperature up to 30°C for a maximum single period of up to 30 days in the original carton in order to protect from light. Record the date when the pre-filled pen is first removed from the refrigerator and the discard date. The discard date must not exceed the original expiry date printed on the carton. Once a pre-filled pen has been stored at room temperature (up to 30°C), it should not be returned to the refrigerator. Discard the pre-filled pen if not used within 30 days at room temperature storage or by the original expiry date, whichever is earlier.
  • Do not shake the WEZENLA pre-filled pens. Prolonged vigorous shaking may damage the medicine.

Do not use this medicine:
  • After the expiry date which is stated on the label and the carton after ‘EXP’. The expiry date refers to the last day of that month.
  • If the liquid is discoloured, cloudy or you can see foreign particles floating in it (see section 6 ‘What WEZENLA looks like and contents of the pack’).
  • If you know, or think that it may have been exposed to extreme temperatures (such as accidentally frozen or heated).
  • If the product has been shaken vigorously.

WEZENLA is for single use only. Any unused product remaining in the pre-filled pen should be thrown away. Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.

6. Contents of the pack and other information
What WEZENLA contains
  • The active substance is ustekinumab. Each pre-filled pen contains 45 mg ustekinumab in 0.5 mL or 90 mg ustekinumab in 1 mL.
  • The other ingredients are L-histidine, L-histidine hydrochloride monohydrate, polysorbate 80, sucrose and water for injections.

What WEZENLA looks like and contents of the pack

WEZENLA is a clear to opalescent, colourless to light yellow solution for injection. It is supplied as a carton pack containing 1 single-dose, glass 1 mL pre-filled pen. Each pre-filled pen contains 45 mg ustekinumab in 0.5 mL or 90 mg ustekinumab in 1 mL of solution for injection.

Marketing Authorisation Holder
Amgen Limited
216 Cambridge Science Park
Milton Road
Cambridge
CB4 0WA
United Kingdom

Manufacturer
Amgen Technology (Ireland) UC
Pottery Road
Dun Laoghaire
Co. Dublin
Ireland

For any information about this medicine, please contact the Marketing Authorisation Holder:

Amgen Limited
Tel: +44 (0)1223 420305

This leaflet was last revised in February 2025.

INSTRUCTIONS FOR USE

This Instructions for Use contains information on how to inject WEZENLA with a pre-filled pen (ConfiPen).

This pre-filled pen delivers WEZENLA with an under-the-skin (subcutaneous) injection. See Package Leaflet for medicine information.

Important information you need to know before injecting WEZENLA

Dosing:

  • WEZENLA comes in two different doses: 45 mg/0.5 mL and 90 mg/1.0 mL. Check the prescription to make sure you have the correct dose.
  • The label colour and window size of the pre-filled pen will be different for each dose. The amount of medicine in the pre-filled pen will also be different for each dose.

Important:

  • If the dose is 90 mg, you will receive either one 90 mg pre-filled pen or two 45 mg pre-filled pens.
    • If you receive two 45 mg pre-filled pens for a 90 mg dose, you will need to give a second injection straight after the first.
    • Repeat steps 1-14 for the second injection using a new pre-filled pen.
    • Choose a different site for the second injection.

Using your WEZENLA pre-filled pen:

  • It is important that you or your caregiver do not try to perform the injection unless you have received training from your doctor or healthcare provider.
  • In children 12 years of age and older with psoriasis who weigh 60 kg or more, it is recommended that WEZENLA is used by or under supervision of a parent or caregiver.
  • Do not use the pre-filled pen if the carton is damaged or the seal is broken.
  • Do not use the pre-filled pen after the expiry date on the label.
  • Do not shake the pre-filled pen.
  • Do not remove the cap from the pre-filled pen until you are ready to inject.
  • Do not use the pre-filled pen if it has been frozen.
  • Do not use the pre-filled pen if it has been dropped on a hard surface. Part of the pre-filled pen may be broken even if you cannot see the break. If available, use a new pre-filled pen and call your doctor or healthcare provider.

Important: Keep the pre-filled pen and sharps disposal container out of the sight and reach of children.

Preparing to inject WEZENLA

1 Wait 30 minutes for the pre-filled pen to reach room temperature.

WAIT

30

minutes

  • Remove the number of pre-filled pens you need for the injection from the refrigerator.
  • Let the pre-filled pen warm up naturally.
  • Do not heat the pre-filled pen with hot water, a microwave or direct sunlight.
  • Do not put it back in the refrigerator once the pre-filled pen reaches room temperature.
  • Do not shake the pre-filled pen at any time.
  • Using the pre-filled pen at room temperature ensures the full dose is delivered and allows for a more comfortable injection.

2 Inspect the medicine. It should be clear to opalescent, colourless to light yellow.

  • It is ok to see air bubbles.
  • Do not use WEZENLA if the medicine is frozen, cloudy, discoloured or has foreign particles floating in it.

3 Check the expiry date (EXP) and inspect the pre-filled pen for damage.

  • Do not use the pre-filled pen if the expiry date has passed.
  • Do not use the pre-filled pen if:
    • the cap is missing or loose,
    • it has cracks or broken parts, or
    • it has been dropped on a hard surface.
  • Make sure you have the right medicine and dose.

Getting ready to inject WEZENLA

4 Gather and place the following items for the injection on a clean, flat and well-lit surface:

  • WEZENLA pre-filled pen (room temperature),
  • Sharps disposal container,
  • Alcohol wipe,
  • Plaster, and
  • Cotton ball or gauze pad.

5 Select one of these injection locations.

  • Select the front of your thigh or belly (except for 5 cm around your belly button).
  • Someone else can inject in your thigh or belly.

Important: Avoid areas with scars, stretch marks or where the skin is tender, bruised, red or hard. If possible, do not use areas of skin that show sign of psoriasis.

6 Wash your hands thoroughly with soap and water.

7 Clean the injection site with an alcohol wipe.

  • Let the skin dry on its own.
  • Do not touch this area again before injecting.

Injecting WEZENLA

Important: Only remove the cap when you can inject straight away (within 5 minutes) because the medicine can dry out. Do not recap.

8 Grasp the pre-filled pen so you can see the window. Pull hard to remove the cap. You may twist the cap to help remove it.

  • Never put the cap back on. It may damage the needle.
  • It is normal to see a drop of medicine at the end of the needle or yellow safety guard.

Important: Do not touch or push the yellow safety guard. Do not put your finger inside of the yellow safety guard.

9 Pinch the skin to create a firm surface at the injection site.

Place the yellow safety guard straight against the pinched skin.

  • Keep the skin pinched until the injection is finished.
  • Make sure you can see the window.
  • Make sure the pre-filled pen is positioned straight on the injection site (at a 90 degree angle).

10 Firmly push the pre-filled pen down until the yellow safety guard stops moving.

Hold the pre-filled pen down, do not lift.

  • The needle will insert automatically and the injection will begin.
  • You may hear or feel a click.
  • Hold the pre-filled pen straight and steady on the skin.

11 Keep pushing down the pre-filled pen. Wait for the window to turn fully yellow.

  • The injection can take up to 15 seconds to complete. You may hear or feel a click.
  • After the window turns fully yellow, lift the pre-filled pen away from the skin.

Checking the injection site and disposing of the pre-filled pen

12 Confirm a full dose of medicine was injected.

  • Do not touch the yellow safety guard.
  • A small amount of liquid on the injection site is ok.

Important: If the window has not turned fully yellow, if it looks like the medicine is still coming out, or if you see several drops of medicine, a full dose was not injected. Call your healthcare provider immediately.

13 Check the injection site.

  • Do not rub the injection site.
  • If there is blood, press a cotton ball or gauze pad on the injection site.
  • Apply a plaster if necessary.

14 Place the used pre-filled pen and cap in the sharps disposal container.

Important: Do not throw away the pre-filled pen in your household waste.

  • Do not reuse the pre-filled pen.
  • Do not touch the yellow safety guard.

Any unused product remaining in the pre-filled pen should be thrown away. Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.

Amgen Ltd
Company image
Address
216 Cambridge Science Park, Milton Road, Cambridge, CB4 0WA, UK
Telephone
+44 (0)1223 420 305
Fax
+44 (0)1223 426 314
Customer Care direct line
+44 (0)808 0100 321
Medical Information Direct Line
+44 (0)1223 436 441
Medical Information e-mail
[email protected]
Medical Information Fax
+44 (0)1223 426 314
OSZAR »