What side effects are most common with Humira (adalimumab)?
Humira (adalimumab) can cause side effects, some of which are more likely than others. Commonly reported issues include injection-site reactions (such as redness, itching, pain, or swelling), headache, dizziness, nausea, and rash [1][2].
What serious side effects should you watch for?
Serious risks are a key part of Humira safety information because it changes parts of the immune system. Seek urgent medical care if you have signs of:
- Serious infections (fever, chills, severe sore throat, cough, shortness of breath, burning with urination, or feeling very unwell) [1][2]
- Tuberculosis (TB) symptoms (persistent cough, weight loss, night sweats) [1][2]
- Other opportunistic infections [1][2]
- Liver problems (yellowing of the skin/eyes, dark urine, severe fatigue, right upper belly pain) [2]
- New or worsening neurologic problems (for example, symptoms that resemble multiple sclerosis: vision changes, weakness, numbness) [2]
- Blood count problems (unusual bruising/bleeding, persistent fever, extreme tiredness) [2]
What are the risks of infections and TB?
Because Humira suppresses tumor necrosis factor (TNF), it can increase the chance of infections, including infections that are more severe or less typical than usual. The medication also carries a risk of TB reactivation, so screening is generally required before starting [1][2].
Can Humira cause allergic reactions or injection problems?
Yes. Some people develop hypersensitivity or severe allergic reactions, which can include swelling of the face or throat, trouble breathing, or widespread rash [2]. Injection-site reactions are also common, though they are usually mild to moderate [1][2].
Are there risks related to cancer or abnormal immune reactions?
Humira’s immune effects have been associated with an increased risk of certain malignancies (including lymphoma and skin cancers) in some patients. It can also cause rare immune-system reactions, including worsening of certain autoimmune neurologic conditions [1][2].
How do side effects differ by condition or dosing?
Side effects are generally similar across approved uses, but risk can vary based on dose, overall health, other immune-suppressing medicines, and whether infections are present or previously treated (for example, TB history). Your prescribing clinician can tailor monitoring based on your specific situation [1][2].
What should patients tell their doctor before starting Humira to reduce risk?
Important details include past or current infections, prior TB exposure, hepatitis or other liver disease, prior neurologic disorders, history of frequent infections, current medications that also affect immunity, and any new symptoms before starting. Pre-treatment screening and ongoing monitoring are central to safety [1][2].
When to contact a clinician right away
Contact your clinician promptly (or seek urgent care) if you develop fever, symptoms of infection, shortness of breath, chest pain, jaundice, severe rash, or signs of neurologic problems. These are the types of reactions that can signal serious complications [1][2].
Sources
- https://www.rxlist.com/humira-drug.htm
- https://www.accessdata.fda.gov/drugsatfda_docs/label/