Patient Leaflet Updated 26-Aug-2025 | Janssen-Cilag Ltd (a Johnson & Johnson Company)
Tremfya 200 mg concentrate for solution for infusion
Tremfya 200 mg concentrate for solution for infusion
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 Crohn’s disease and ulcerative colitis.
Tremfya is used to treat adults with moderate to severe Crohn’s disease, 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 cannot tolerate these medicines, you may be given Tremfya.
Using Tremfya in Crohn’s disease can benefit you by reducing the signs and symptoms of the disease such as diarrhoea, abdominal pain, and the inflammation of your intestinal lining. These effects can improve your ability to do normal daily activities and reduce fatigue.
Tremfya is used to treat moderate to severe ulcerative colitis in adults, 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 cannot tolerate these medicines, you may be given Tremfya.
Using Tremfya in ulcerative colitis can benefit you by reducing the signs and symptoms of the disease including bloody stools, the need to rush to and the number of times you go to the toilet, abdominal pain and the inflammation of your intestinal lining. These effects can improve your ability to do normal daily activities and reduce fatigue.
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.
As directed by your doctor, you may need blood tests to check if you have high levels of liver enzymes before you start taking Tremfya and when using it. Increases in liver enzymes may occur more frequently in patients receiving Tremfya every 4 weeks than in patients receiving Tremfya every 8 weeks (see “How to use Tremfya” in section 3).
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, lightheadedness or dizziness, or hives (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 and adolescents under 18 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 10 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.
This medicine contains less than 1 mmol sodium (23 mg) per dose, that is to say essentially ‘sodium-free’.
However, before Tremfya is given to you, it is mixed with a solution that contains sodium. Talk to your doctor if you are on a low salt diet.
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.
Crohn’s disease
Treatment start can be given either by intravenous infusion or administered subcutaneously:
Maintenance therapy:
A maintenance dose of Tremfya will be given by injection under the skin (subcutaneous injection) either with 100 mg or 200 mg. Your doctor will decide which maintenance dose you will receive:
Ulcerative Colitis
Treatment start:
Treatment start can be given either by intravenous infusion or administered subcutaneously:
Maintenance therapy:
A maintenance dose of Tremfya will be given by injection under the skin (subcutaneous injection) either with 100 mg or 200 mg. Your doctor will decide which maintenance dose you will receive:
You may decide together with your doctor to give Tremfya yourself in which case you will get the appropriate training on how to inject Tremfya. Talk to your doctor or nurse if you have any questions about giving yourself an injection. It is important not to try to inject yourself until you have been trained by your doctor or nurse.
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.
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 100 people) - the signs or symptoms 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.
Tremfya 200 mg concentrate for solution for infusion is given in a hospital or clinic and patients should not need to store or handle it.
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 vial label and on the outer carton after “EXP”. The expiry date refers to the last day of that month.
Keep the vial 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.
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 infusion.
Each pack contains 1 vial.
This leaflet was last revised in April 2025
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