Kineret Side Effects

Generic name: anakinra

Medically reviewed by Philip Thornton, DipPharm. Last updated on Feb 15, 2025.

Note: This document provides detailed information about Kineret Side Effects associated with anakinra. Some dosage forms listed on this page may not apply specifically to the brand name Kineret.

Applies to anakinra: subcutaneous solution.

Serious side effects of Kineret

Along with its needed effects, anakinra (the active ingredient contained in Kineret) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking anakinra:

More common side effects

• agitation
• coma
• confusion
• decreased urine output
• diarrhea
• dizziness
• fast heartbeat
• fever or chills
• headache
• itching, pain, redness, swelling, tenderness or warmth on the skin
• irritability
• joint pain
• lethargy
• muscle aches, pains, and twitching
• nausea or vomiting
• nervousness
• numbness or tingling in the hands, feet, or lips
• restlessness
• runny nose or sneezing
• seizures
• sore throat
• stomach pain
• stupor
• swelling of the face, ankles, or hands
• swelling of the feet or lower legs
• trouble breathing
• unusual tiredness or weakness
• weakness or heaviness of the legs

Less common side effects

• black, tarry stools
• cough
• difficulty with swallowing
• hives, itching, or rash
• painful or difficult urination
• pale skin
• swelling of the face or lips
• ulcers, sores, or white spots in the mouth
• unusual bruising or bleeding

Incidence not known

• bleeding gums
• blood in the urine or stools
• large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
• pinpoint red spots on the skin
• puffiness or swelling of the eyelids or around the eyes, face, lips or tongue

Other side effects of Kineret

Some side effects of anakinra may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common side effects

• bleeding, blistering, burning, coldness, discoloration of skin, feeling of pressure, hives, infection, inflammation, itching, lumps, numbness, pain, rash, redness, scarring, soreness, stinging, swelling, tenderness, tingling, ulceration, or warmth at the injection site
• difficulty with moving
• headache
• muscle aches or stiffness

For healthcare professionals

Applies to anakinra: subcutaneous solution.

General adverse events

The most common side effects reported in patients with rheumatoid arthritis (RA) were injection site reaction, worsening of RA, upper respiratory tract infection, headache, nausea, diarrhea, sinusitis, arthralgia, influenza-like symptoms, and abdominal pain. The most common side effects reported in patients with neonatal-onset multisystem inflammatory disease (NOMID) during the first 6 months of therapy were injection site reaction, headache, vomiting, arthralgia, pyrexia, and nasopharyngitis; the most common side effects after the first 6 months of therapy included arthralgia, headache, pyrexia, upper respiratory tract infections, nasopharyngitis, and rash. The most common side effects reported in patients with deficiency of interleukin-1 receptor antagonist (DIRA) were upper respiratory tract infections, rash, pyrexia, influenza-like illness, and gastroenteritis.^[Ref]

Cardiovascular

• Common (1% to 10%): Hypertension

Dermatologic

• Common (1% to 10%): Ecchymosis, rash (including maculopapular rash, urticarial rash), pruritus

Gastrointestinal

• Very common (10% or more): Vomiting (up to 14%)
• Common (1% to 10%): Nausea, diarrhea, abdominal pain, dyspepsia
• Frequency not reported: Gastroenteritis

Genitourinary

• Common (1% to 10%): Urinary tract infection

Hematologic

• Common (1% to 10%): Neutropenia, thrombocytopenia, decreased total WBC count, decreased platelets, increased eosinophil differential percentage
• Postmarketing reports: Thrombocytopenia (including severe thrombocytopenia)

In controlled trials, decreases in total WBC counts of at least 1 WHO toxicity grade occurred in 8% of patients treated with this drug, compared with 2% of placebo-treated patients. Neutropenia (absolute neutrophil count [ANC] less than 1 x 10[9]/L) developed in 0.4% of patients treated with this drug. Increases in eosinophil differential percentage of at least 1 WHO toxicity grade occurred in 9% of patients treated with this drug, compared with 3% of placebo-treated patients. Of patients treated concurrently with this drug and etanercept, 2% developed neutropenia (ANC less than 1 x 10[9]/L). While neutropenic, 1 patient developed cellulitis which recovered with antibiotic therapy. Decreases in platelets (WHO toxicity grade 1) occurred in 2% of patients treated with this drug, compared with 0% of placebo-treated patients.

During postmarketing experience, thrombocytopenia has been reported, including occasional case reports indicating severe thrombocytopenia (i.e., platelet counts less than 10 x 10[9]/L).

Hepatic

• Uncommon (0.1% to 1%): Hepatic enzyme increased
• Postmarketing reports: Noninfectious hepatitis, elevations of transaminases

Hypersensitivity

• Uncommon (0.1% to 1%): Allergic reactions (including anaphylactic reactions, angioedema, urticaria, pruritus)

Immunologic

• Very common (10% or more): Antidrug antibodies positive (up to 49%)
• Common (1% to 10%): Neutralizing antibodies positive
• Postmarketing reports: Macrophage activation syndrome

Local

• Very common (10% or more): Injection site reaction (including erythema, ecchymosis, inflammation, pain; up to 71.2%)

The most common and consistently reported therapy-related side effect associated with this drug was injection site reaction (characterized by erythema, ecchymosis, inflammation and/or pain). In general, injection site reactions were reported within the first 2 to 4 weeks of therapy and lasted for 2 to 6 weeks. Injection site reactions were reported as mild, moderate, and severe in 72.6%, 24.1%, and 3.2% of patients, respectively.

Musculoskeletal

• Very common (10% or more): Worsening of RA (up to 19.1%), arthralgia (up to 11.6%)
• Common (1% to 10%): Limb pain, back pain, myalgia, fracture

Nervous system

• Very common (10% or more): Headache (up to 14%)
• Common (1% to 10%): Dizziness

Oncologic

• Frequency not reported: Lymphomas, malignancies (including breast, respiratory system, digestive system)

Other

• Very common (10% or more): Infection (up to 39%), pyrexia (up to 11.6%), increased blood cholesterol
• Common (1% to 10%): Influenza-like symptoms, peripheral edema, injury, fever, chest pain, fatigue, serious infections (primarily bacterial [e.g., cellulitis, pneumonia, bone and joint infections, sepsis])
• Frequency not reported: Death

In clinical trials during the first 6 months of therapy, infection was reported in 39% of patients treated with this drug and 37% of patients treated with placebo. Over 6 and 12 months, respectively, serious infections were reported in 2% and 3% of patients treated with this drug and 1% and 2% of placebo-treated patients; these infections were primarily bacterial (e.g., cellulitis, pneumonia, bone and joint infections). Most patients (73%) continued on study drug after the infection resolved. No serious opportunistic infections were reported. Patients with asthma were at higher risk of developing serious infection when treated with this drug (8 of 177 patients [4.5%]) compared to placebo (0 of 50 patients [0%]).

In extension trials, the overall rate of serious infection was stable over time and comparable to that observed in controlled trials. In clinical trials and postmarketing experience, cases of opportunistic infections were reported and included fungal, mycobacterial, viral, and bacterial pathogens. Infections have been observed in all organ systems and have been reported with this drug alone or in combination with immunosuppressive agents.

Serious infections were reported in 7% of patients treated with this drug and etanercept for up to 24 weeks. The most common infections were bacterial pneumonia (4 cases) and cellulitis (4 cases); 1 patient with pulmonary fibrosis and pneumonia died due to respiratory failure.

In 2 long-term safety studies of RA over 3 years, 4 deaths due to serious infections (1 pneumonia and 3 sepsis) were reported; these deaths were considered related to this drug.

Psychiatric

• Common (1% to 10%): Insomnia, depression

Respiratory

• Very common (10% or more): Upper respiratory tract infection (up to 14%), nasopharyngitis (up to 11.6%)
• Common (1% to 10%): Sinusitis, bronchitis, cough, sore throat, upper respiratory tract congestion, dyspnea

Frequently asked questions

• What are the new drugs for rheumatoid arthritis (RA)?

Further information

Kineret side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

Medical Disclaimer