GUSELKUMAB
Background and Date of Approval
Guselkumab is a prescription biologic medication indicated for the management of certain chronic inflammatory diseases affecting the skin and joints. It functions by modulating an overactive immune response, which is typically central to the pathophysiology of these conditions. The U.S. Food and Drug Administration approved guselkumab in July 2017 following clinical trials demonstrating significant efficacy in patients with moderate-to-severe plaque psoriasis. Subsequent studies established its clinical utility in patients with joint-related conditions. Its extended duration of action and convenient dosing regimen have positioned it as an option for doctors managing chronic inflammatory symptoms with reduced dosing frequency compared to daily alternatives.
Uses
Guselkumab is FDA-approved for the treatment of: Moderate-to-severe plaque psoriasis in adults who are candidates for systemic therapy or phototherapy Active psoriatic arthritis in adults, either alone or in combination with other arthritis medicines
Side Effects
Common Side Effects: Upper respiratory infections (cold, sore throat) Headache Diarrhea Joint pain Redness or pain at the injection site Serious Side Effects: Serious allergic reactions (rash, swelling, difficulty breathing) Increased risk of infections such as tuberculosis (TB) Liver enzyme abnormalities Reactivation of latent infections (like hepatitis B) Contact your doctor immediately if you experience persistent fever, chills, cough, or shortness of breath.
Warnings
Do not use if you have a severe allergic reaction to any ingredient in this medication. Avoid use in patients with active tuberculosis or other severe infections. Live vaccines should not be given during treatment. May interact with other immunosuppressants; consult your doctor before combining medications. Risk of lower immune function, which may make it harder to fight infections.
Precautions
Before starting this medicine, you should be tested for tuberculosis. Inform your doctor if you have a history of chronic infections, liver issues, or immune system disorders. Tell your healthcare provider about all the medicines and supplements you take. It’s also important to avoid alcohol and smoking, which can worsen inflammation and reduce the drug's effectiveness. If you’re pregnant or breastfeeding, discuss the risks and benefits before starting therapy.
Word of Advice
Follow your doctor's prescribed dosage and timing consistently, regardless of symptom improvement. Store injection pens in the refrigerator and allow them to reach room temperature before administration. Do not inject into areas of inflamed or bruised skin. Maintain a symptom diary to monitor skin and joint response to treatment. A balanced diet and regular physical activity may support overall health during therapy. Treatment outcomes typically require several weeks to become apparent, as this is a long-term therapeutic approach.
References
https://reference.medscape.com/drug/tremfya-guselkumab-1000164 https://go.drugbank.com/drugs/DB11834 https://www.ema.europa.eu/en/documents/product-information/tremfya-epar-product-information_en.pdf https://www.jnj.com/media-center/press-releases/tremfya-guselkumab-receives-u-s-fda-approval-for-adults-with-moderately-to-severely-active-ulcerative-colitis-strengthening-johnson-johnsons-leadership-in-inflammatory-bowel-disease
Frequently Asked Questions
What is Guselkumab used for?
It is used to treat moderate-to-severe plaque psoriasis and psoriatic arthritis in adults. It helps reduce inflammation, itching, scaling, and joint pain caused by these autoimmune conditions.
Is TREMFYA an IL-23 inhibitor?
Yes, TREMFYA (brand name for guselkumab) is an IL-23 inhibitor. It works by blocking a specific protein (interleukin-23) involved in triggering inflammation in conditions like psoriasis and psoriatic arthritis.
When is the best time to take Guselkumab?
There is no specific "best time" of day. It is taken by injection once every 8 weeks after the initial doses, based on a schedule provided by your doctor. Consistency is more important than timing.
Should Guselkumab be taken with or without food?
This medicine is injected under the skin and is not affected by food. So, you can take it regardless of meals.
What is the mechanism of action of Guselkumab?
Guselkumab blocks the activity of a protein called interleukin-23 (IL-23), which plays a key role in causing inflammation in the skin and joints. By stopping this signal, it helps reduce the immune system's attack on the body, leading to clearer skin and reduced joint discomfort.