IL-23 inhibitor · Biologic
Tremfya (guselkumab)
How this therapy is used at Arthritis Care of Texas in Corpus Christi, TX — what it treats, how it is given, and how often.
- Treats
- Psoriasis · Psoriatic arthritis
- How given
- Self-injection at home
- How often
- Every 8 weeks, after starter doses
Tremfya does both jobs: it relieves symptoms and, in psoriatic arthritis, helps protect joints from ongoing damage. Skin often starts clearing within 1–2 months, with full effect judged around 4 months. It is not a painkiller, and its benefit depends on steady treatment — even though doses are only every 8 weeks, do not skip them once you feel well.
What it is
Tremfya (guselkumab) is a biologic medicine that blocks interleukin-23 (IL-23) — a protein that helps keep the immune system in an inflamed state in psoriasis and psoriatic arthritis. Blocking it helps clear the skin and eases joint pain, swelling, and stiffness. Because IL-23 sits near the top of the inflammation chain, blocking it can calm several steps below it at once. Tremfya is a long-term maintenance treatment, taken on a set schedule whether or not you have symptoms that day.
Before starting
Before your first dose, we screen for tuberculosis (TB). Immune-calming medicines can allow a hidden, inactive TB infection to become active, so that check — and treating any inactive infection first — is what makes ongoing treatment safe. We also review your infection history and vaccination record: live vaccines should not be given during treatment, and completing needed vaccines before starting lets your immune system respond to them fully. Treatment is not begun while you have an active infection. Tell us about any liver problems, as this medicine can occasionally affect liver blood tests.
How it’s given
It is an injection under the skin that you can learn to give yourself at home with a pre-filled pen, into the thigh, belly, or upper arm. After two starter doses a month apart, it is taken once every 8 weeks — one of the least frequent schedules among psoriasis and psoriatic arthritis biologics. Keep pens refrigerated, let one warm to room temperature for about 30 minutes before use, and rotate where you inject.
What to expect
Many people see their skin start to clear within the first 1–2 months, with results usually judged around 4 months; joint pain and stiffness improve over about 2–3 months. The most common side effects are cold symptoms and other upper respiratory infections, headache, joint aches, diarrhoea, and redness or soreness at the injection site. Because immune defence is lowered somewhat, infections can occur — call us for fever, a lingering cough, or an infection that is not improving. Keep taking Tremfya on schedule even when your skin is completely clear; stopping lets the inflammation rebuild.
Everyday guidance
The every-8-week rhythm is easy to lose track of, so put doses on your calendar with a reminder. If a dose is late, take it as soon as you remember, then take the next dose 8 weeks later. Most people on Tremfya need no routine lab monitoring, though we may check liver tests from time to time. Store the pen in its carton in the refrigerator to protect it from light, and never freeze it. Tell other clinicians you are on a biologic, and check with us before vaccines or surgery. For questions or signs of infection, call (361) 400-7700.
Used for
Common worries
Only one injection every 8 weeks — is that really enough?
Yes. Tremfya is designed to last: each dose keeps IL-23 blocked for the full interval, and trials used exactly this schedule. The wide spacing is a feature of the medicine, not a weaker dose.
Will it make infections more likely?
Somewhat — mostly ordinary colds and respiratory infections. We screen for TB before starting, and we want to hear about fevers or infections that are not improving.
What if I’m late with a dose?
Take it as soon as you remember, then take the next dose 8 weeks later. A short delay is not a disaster — just don’t let the schedule drift repeatedly.
Wondering whether Tremfya is right for you?
Call (361) 400-7700 to schedule a visit, or send an appointment request and we will call you to confirm.
Request an Appointment