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The product code(s) for this leaflet is: PL 00242/0775.
Tremfya 45 mg/0.45 mL solution for injection in pre-filled pen
Tremfya 45 mg/0.45 mL solution for injection in pre-filled pen
For paediatric patients less than 40 kg
guselkumab
1. What Tremfya is and what it is used for
2. What you need to know before you use Tremfya
3. How to use Tremfya
4. Possible side effects
5. How to store Tremfya
6. Contents of the pack and other information
Tremfya contains the active substance guselkumab which is a type of protein called a monoclonal antibody.
This medicine works by blocking the activity of a protein called IL-23, which is present at increased levels in people with psoriasis.
Tremfya is used to treat children 6 years of age and older with moderate to severe “plaque psoriasis”, an inflammatory condition affecting the skin.
Tremfya can improve the condition of the skin and reduce signs and symptoms, such as scaling and redness.
Talk to your doctor, pharmacist or nurse before using Tremfya:
If you are not sure if any of the above applies to you, talk to your doctor, pharmacist or nurse before using Tremfya.
Tremfya can potentially cause serious side effects, including allergic reactions and infections. You must look out for signs of these conditions while you are taking Tremfya.
Signs or symptoms of infections may include fever or flu like symptoms; muscle aches; cough; shortness of breath; burning when you urinate or urinating more often than usual; blood in your phlegm (mucus); weight loss; diarrhoea or stomach pain; warm, red, or painful skin or sores on your body which are different from your psoriasis.
Serious allergic reactions have occurred with Tremfya. Symptoms may include swollen face, lips, mouth, tongue or throat, difficulty swallowing or breathing and hives, have occurred with Tremfya (see “Serious side effects” in section 4).
Stop using Tremfya and tell your doctor or seek medical help immediately if you notice any signs indicating a possible serious allergic reaction or an infection.
Tremfya is not recommended for children less than 6 years of age because it has not been studied in this age group.
Tell your doctor or pharmacist:
Tremfya is unlikely to influence your ability to drive and use machines.
This medicine contains 0.3 mg of polysorbate 80 in each dosage unit which is equivalent to 0.5 mg/mL.
Polysorbates may cause allergic reactions. Tell your doctor if you have any known allergies.
Always use this medicine exactly as your doctor has told you. Check with your doctor or pharmacist if you are not sure.
Your doctor will decide for how long you need to use Tremfya.
Plaque psoriasis in children from the age of 6 years
Children weighing less than 40 kg:
Children weighing 40 kg or more:
At the start, your doctor or nurse will inject Tremfya. Your doctor may decide that your caregiver may be able to give Tremfya after receiving appropriate training from your doctor on how to inject Tremfya. Talk to your doctor or nurse if you have any questions about your injection.
For detailed instructions on how to use Tremfya, carefully read the ‘Instructions for use’ leaflet before use, which is included in the carton.
If you have received more Tremfya than you should or the dose has been given sooner than prescribed, inform your doctor.
If you have forgotten to inject a dose of Tremfya, inform your doctor.
You should not stop using Tremfya without speaking to your doctor first. If you stop treatment, your symptoms may come back.
If you have any further questions on the use of this medicine, ask your doctor, pharmacist or nurse.
Like all medicines, this medicine can cause side effects, although not everybody gets them.
Stop using Tremfya, tell your doctor or seek medical help immediately if you get any of the following side effects:
Possible serious allergic reaction (may affect up to 1 in 1000 people) - the signs may include:
The following side effects are all mild to moderate. If any of these side effects becomes severe, tell your doctor, pharmacist or nurse immediately.
Very common (may affect more than 1 in 10 people)
Common (may affect up to 1 in 10 people)
Uncommon (may affect up to 1 in 100 people)
Rare (may affect up to 1 in 1,000 people)
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 via the Yellow Card Scheme at: https://yellowcard.mhra.gov.uk 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.
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 pre-filled pen label and on the outer carton after “EXP”. The expiry date refers to the last day of that month.
Keep the prefilled pen in the outer carton in order to protect from light.
Store in a refrigerator (2°C–8°C). Do not freeze.
Do not shake.
Do not use this medicine if you notice that the medicine is cloudy or discoloured, or contains large particles. Before use, remove the carton from the refrigerator and keep the pre-filled pen inside the carton and allow to reach room temperature by waiting for 30 minutes.
This medicine is for single use only. 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.
Tremfya is a clear, colourless to light yellow solution for injection (injection). It is available in packs containing one pre-filled pen.
For information in large print, tape, CD or Braille, telephone 0800 7318450
This leaflet was last revised in 11/2025
Tremfya
45 mg/0.45 mL
solution for injection in pre-filled pen, VarioJect
For paediatric use
This Instructions for Use contains information on how to inject Tremfya.
Know your dose.
Tremfya comes in a single-use pre-filled pen that allows you to manually set a specific, prescribed dose. If unsure of the correct dose, contact the prescribing doctor before injecting.
If your doctor decides that a caregiver may be able to give your injections of Tremfya at home, they should receive training on the correct way to prepare and inject Tremfya before using the pre-filled pen. If your caregiver has not been trained, or has any questions, please call your doctor.
Read this Instructions for Use before using the Tremfya pre-filled pen and each time you get a refill.
There may be new information.
This instruction guide does not take the place of talking with your doctor about your medical condition or your treatment.
Please also read the Package Leaflet carefully before starting the injection and discuss any questions you may have with your doctor or nurse.
Each pre-filled pen can only be used one time. Throw away the used pre-filled pen after one dose, even if there is medicine left in it.
Do not reuse the pre-filled pen.
Store in refrigerator at 2°C to 8°C.
Do not freeze the pre-filled pen.
Do not shake the pre-filled pen.
Keep the pre-filled pen in the original carton to protect from light and physical damage.
Keep the Tremfya pre-filled pen and all medicines out of reach of children.
Call your doctor to talk about any questions you may have. For additional assistance refer to the Package Leaflet for your local representative contact information.
Not provided in the pre-filled pen carton:
Allow Tremfya to come to room temperature and inspect carton
Remove the carton from the refrigerator and let the carton sit on a flat surface at room temperature for approximately 30 minutes before use.
Do not warm the pre-filled pen any other way.
Check the expiration date (‘EXP’) on the carton.
Do not use the pre-filled pen if the expiration date has passed or if the seal on the carton is broken. Call your doctor or pharmacist for a new pre-filled pen.
Choose injection site
Select a site from the following areas for the injection:
Do not inject into skin that is tender, bruised, red, scaly, hard, thick, has scars, or is affected by psoriasis.
Wash hands and Clean injection site
Wash your hands well with soap and warm water.
Wipe the chosen injection site with an alcohol swab and allow it to dry by air.
Do not touch, fan, or blow on the injection site after you have cleaned it.
Inspect liquid in viewing window
Take the pre-filled pen out of the carton.
Check the liquid in the viewing window. It should be clear and colourless to slightly yellow and may contain tiny white or clear particles.
You may also see air bubbles.
This is normal.
Do not inject if the liquid is:
Call your doctor or pharmacist for a new pre-filled pen.
Keep the pre-filled pen pointing up during this step
Tap pre-filled pen to move air bubbles to the top even if you do not see any air bubbles
Hold the pre-filled pen with the teal coloured cap pointing up.
Tap gently near the viewing window. This will cause any air bubbles to rise to the top.
Do not set the pre-filled pen down until air bubbles are removed.
Remove cap
Keep holding the pre-filled pen with the teal cap pointing up, then pull the cap to remove.
Keep hands away from the orange needle guard after the cap is removed.
Pushing the needle guard too soon may lock the pre-filled pen and you will not be able to give the dose.
Do not put the cap back on as this may damage the needle.
Do not use the pre-filled pen if it is dropped after removing the cap. Call your doctor or pharmacist for a new pre-filled pen.
Press the plunger until it stops to push out air bubbles
Keep holding the pre-filled pen with the orange needle guard pointing up.
Confirm air bubbles are removed by checking that the orange priming band is no longer visible in the dose selection notch.
Liquid may squirt out. This is normal.
Turn the plunger to set the dose
Turn the plunger until the dose line and dose number that corresponds to the prescribed dose (see table below) is in the dose selection notch as shown in the image above.
Prescribed dose Turn plunger to:
20 mg = 20 mg
25 mg = 25
30 mg = 30
35 mg = 35
40 mg = 40
45 mg = 45
Read all sub-steps from A to D before injecting
Position pre-filled pen straight onto the injection site
Position the pre-filled pen straight onto the injection site with the orange needle guard against the skin and the viewing window facing you.
Continue to hold the pre-filled pen against the skin.
Push pre-filled pen down to insert the needle into the skin and hold in place
Do not press the plunger yet.
Do not lift the pre-filled pen from the skin.
Push the pre-filled pen into the skin until the orange needle guard stops to insert the needle into the skin. Some orange will still be showing.
Slowly press the plunger all the way down until it stops to inject Tremfya
Do not lift the pre-filled pen from the skin during the injection.
Otherwise, the orange needle guard will lock, and you will not be able to give the full dose.
You will feel some resistance as you press the plunger. This is normal.
If a small dose is set, the plunger will only move a short distance.
Hold and confirm injection is complete
Hold the pre-filled pen in place and keep pushing against the skin for 5 seconds.
Confirm injection is complete by checking that:
After confirming, lift the pre-filled pen from the skin.
The orange needle guard will extend and lock.
It is normal to see some liquid left in the viewing window.
Check injection site
There may be a small amount of blood or liquid at the injection site. Gently hold pressure over the injection site with a cotton ball or gauze pad until any bleeding stops.
Do not rub the injection site.
If needed, cover injection site with a bandage.
Dispose of the pre-filled pen
Put the used pre-filled pen in a sharps disposal container right away after use.
Do not throw away (dispose of) the pre-filled pen in your household waste.
Make sure you dispose of the bin as instructed by your doctor or nurse when the container is full.
Do not recycle the used sharps disposal container.
VarioJect™ is a trademark of Ypsomed AG, used under license.