Does Cosentyx (secukinumab) reduce appetite?
Cosentyx (secukinumab) is used for inflammatory conditions such as plaque psoriasis, psoriatic arthritis, and ankylosing spondylitis. There is no clear, consistent, well-established medical link that Cosentyx directly “reduces appetite” as a typical or expected effect.
What people may notice instead is appetite change as part of general side effects or day-to-day illness variation. If you’re seeing a reduction in appetite after starting Cosentyx, it’s important to treat it as a symptom to monitor rather than assume it’s definitely caused by the medication.
What side effects could affect eating or hunger while on Cosentyx?
Even when appetite change isn’t the headline symptom, some Cosentyx-related effects could indirectly make eating less appealing, such as:
- Gastrointestinal symptoms (for example, nausea or diarrhea), if they occur
- Feeling unwell during treatment or during intercurrent infections
If the appetite reduction comes with other concerning symptoms (significant weight loss, vomiting, severe abdominal pain, persistent diarrhea, fever), it warrants prompt medical advice.
What should you do if your appetite drops after starting Cosentyx?
Practical steps:
- Note timing: whether appetite drops soon after doses or after infections/flare-ups.
- Track severity: whether you’re eating less because of nausea, stomach upset, or general fatigue.
- Contact your prescriber if it persists beyond a short period, or if weight loss is significant.
They can check for other causes (ongoing disease activity, infections, other medications, or GI conditions) and decide whether any action is needed.
When is reduced appetite a red flag?
Seek urgent care or medical review quickly if reduced appetite is paired with:
- Fever, severe weakness, or signs of infection
- Persistent vomiting, severe or worsening abdominal pain
- Black/bloody stools, or severe diarrhea
- Rapid or significant weight loss
How to confirm whether Cosentyx is the cause
The most reliable way is clinical review with your dosing history. Your clinician may ask:
- Start date and dose changes
- Other new meds or supplements
- Recent infections or symptom flare
- Any GI symptoms (nausea, reflux, diarrhea)
- Weight change
If appetite returns when the medication is held or delayed (and this is done under clinician guidance), that can support a medication association.
Sources
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