What side effects are linked to Stelara (ustekinumab) injections?
Stelara (ustekinumab) injections can cause side effects that range from mild injection-site reactions to more serious infection and immune-related problems. Commonly reported effects include reactions where the shot is given (such as redness or pain) and general symptoms like headache. Serious risks include infections, including cases that can be life-threatening, and allergic reactions [1].
What are the most common Stelara injection-site and general side effects?
People taking Stelara may experience side effects shortly after injection, most often at the injection site (for example, redness, swelling, or discomfort). Some also report general symptoms such as headache [1].
What serious side effects should people watch for?
The main serious concern with Stelara is infection risk. Because ustekinumab changes parts of the immune response, it can make it harder for the body to fight infections, including serious ones [1]. Patients should also seek urgent help for signs of a serious allergic reaction, such as trouble breathing or swelling of the face or throat [1].
Can Stelara increase the risk of infections?
Yes. Stelara can increase the risk of infections, including infections that may become severe. This is one of the key safety warnings tied to the drug [1].
What should patients do before starting Stelara to reduce risk?
Before treatment, clinicians typically screen for infection risks, including tuberculosis (TB) and other infections, because starting an immune-modifying therapy can worsen certain infections if they are already present. This screening is part of the safety approach for medicines like Stelara [1].
What if side effects happen after the injection?
If side effects are mild (such as temporary injection-site irritation), they often improve without stopping therapy, but patients should still report them to their prescriber. If symptoms suggest infection (fever, feeling very unwell, or localized signs of infection) or an allergic reaction, patients should seek urgent medical care rather than waiting [1].
Sources
[1] https://www.drugs.com/stelara.html