Etanercept - Uses, Dosage, Side Effects, and Drug Warnings

Overview:

Etanercept is an approved drug for the treatment of rheumatoid arthritis. It is the first anti-tumor necrosis factor agent that reduces the symptoms of rheumatoid arthritis and slows down the progression of radiographic damage. Etanercept helps boost the patient's functioning, thereby improving the quality of life.

Various clinical trials have been performed over the past decade to establish the efficacy and safety of this drug for early rheumatoid arthritis. Etanercept can be used alone or in combination with Methotrexate. Apart from rheumatoid arthritis, Etanercept can be used to treat psoriatic arthritis.

Etanercept is also approved for treating psoriatic arthritis, which helps manage joint inflammation and skin symptoms. Additionally, it has been explored in clinical studies for other autoimmune conditions, such as ankylosing spondylitis and plaque psoriasis, further highlighting its versatility as an anti-TNF agent.

What Is Etanercept Used For?

Etanercept is a medication primarily used to treat several autoimmune conditions where the body’s immune system attacks its healthy tissues. The key uses of Etanercept include:

• Rheumatoid Arthritis: By inhibiting tumor necrosis factor (TNF), which contributes to inflammation, etanercept helps lessen the pain, edema, and inflammation associated with rheumatoid arthritis. It is often used alongside medications like Methotrexate for better symptom management.

• Psoriatic Arthritis: In addition to treating joint pain and swelling, Etanercept can help manage the skin manifestations of psoriasis, which includes red, scaly patches. It is beneficial for both adults and children.

• Ankylosing Spondylitis: Etanercept can also be used to treat Ankylosing Spondylitis, a condition that affects the spine and causes pain and stiffness.

• Chronic Plaque Psoriasis: Etanercept is used to treat psoriasis, especially in cases where skin lesions cover large areas of the body. It is effective for adults and children over four years old.

• Juvenile Idiopathic Arthritis: Etanercept is also prescribed for children and patients who have juvenile idiopathic arthritis, which causes inflammation of the joints and can affect growth and development.

Warnings:

Etanercept may affect the patient's immunity by decreasing the ability to fight infections, leading to severe viral, bacterial, or fungal disease. The doctor must be informed about these infections, which range from minor to major chronic infections that do not resolve independently. These infections may require hospitalization and can be fatal. The patient must inform the doctor if they have diabetes, an acquired immunodeficiency syndrome (AIDS), any other disorder that alters their immunity, or any medication they are taking.

If the patient has tuberculosis (TB) and hepatitis B without any symptoms, Etanercept administration may increase the risk of developing severe symptoms. In this condition, the doctor might treat the infection first and then begin the administration of Etanercept.

For Patients:

Why Is Etanercept Prescribed?

Etanercept is prescribed alone or with other drugs to manage the symptoms of certain autoimmune disorders (disorders where the immune system attacks healthy parts of the body, causing pain, swelling, and damage). It is used majorly for treating rheumatoid arthritis, a disorder where the body attacks its own joints and leads to loss of function, pain, and swelling.

How to Use Etanercept?

Etanercept is available in the form of

• Injection solution or liquid in single-dose.

• Prefilled syringes.

• Dosing pens.

• Cartridges.

• Automatic injection devices.

Etanercept injection products are also available in powder form in a multi-dose vial that has to be mixed with the liquid provided.

Things to Know Before You Start Etanercept

Before starting Etanercept, there are several important considerations to keep in mind:

• Etanercept Side Effects: Common side effects include injection site reactions (pain, redness, swelling), upper respiratory infections, and headaches. Less common but more serious side effects include serious infections, certain cancers like lymphoma, and liver problems. It is important to discuss the risks and benefits with your doctor before beginning therapy.

• Allergies and Medical History: Additionally, patients should disclose any history of diseases like diabetes, liver disease, heart failure, and nervous system disorders such as multiple sclerosis or Guillain-Barré syndrome, as they may affect how your body responds to the medication.

• Etanercept Injection: This medication is delivered through a subcutaneous etanercept injection. The injection is typically self-administered once a week, although the frequency may vary depending on the condition being treated. The injection should be administered in areas like the front of the thigh or lower stomach, avoiding the navel area.

• Etanercept Drug Class: Etanercept belongs to the TNF inhibitors drug class. TNF inhibitors block the action of tumor necrosis factor (TNF), which contributes to the inflammation seen in autoimmune conditions.

• Etanercept Nursing Considerations: Nurses should monitor patients for signs of infections, injection site reactions, and any adverse reactions that may occur. Educating patients on proper injection techniques and safe storage of etanercept injection devices is essential for proper administration.

What Special Precautions Must Be Followed?

• Allergies

• Diabetes.

• Seizures.

• Liver disease.

• Heart failure.

• Guillain-Barré syndrome (weakness, tingling, and paralysis due to sudden nerve damage).

• Optic neuritis (nerve inflammation that sends messages from the eye to the brain).

• Bleeding problems.

• Pregnancy

• Surgery: The doctor must be informed about the medication before any surgery, including dental surgery.

What Special Dietary Instructions Should Be Followed?

A normal diet can be continued unless advised by the doctor otherwise.

What Should Be Done in Case of a Missed Dose?

The missed dose must be taken by the patient as soon as they remember. However, if it is almost time to take the next dose, the missed dose must not be taken, and the regular schedule should be continued. A double dose must not be administered to compensate for the missed dose.

Side Effects:

• Redness.

• Itching.

• Pain.

• Swelling.

• Bleeding.

• Bruising.

• Seizures.

• Problems with vision.

• Bruising.

• Bleeding.

• Rash.

• Hives.

• Pale skin.

Adults taking Etanercept injections are at greater risk of developing the following conditions:

• Leukemia (cancer affecting the white blood cells).

• Skin cancer.

• Lymphoma.

Storage and Disposal of Etanercept:

• The container of Etanercept should be tightly closed and kept out of reach of children.

• Etanercept injections must be stored away from light.

• Etanercept injection must be stored in the refrigerator but not frozen.

• Etanercept should be refrigerated and not exposed to excessive moisture and heat.

• If Etanercept is no longer required, it should be disposed of properly so that pets and children do not consume the medications by mistake.

For Doctors:

Etanercept is a biologic TNF inhibiting agent frequently used to manage rheumatoid arthritis, ankylosing spondylitis, plaque psoriasis, psoriatic arthritis, and juvenile idiopathic arthritis. Etanercept is a receptor that inhibits the inflammatory response in joints and skin, which is characteristic of these autoimmune disorders by binding to TNF-alpha and TNF-beta. The drug can be administered with other immunosuppressants like Methotrexate and as a monotherapy (administered alone). Doctors can use Etanercept for approved and off-label indications.

Indications:

• Rheumatoid arthritis.

• Ankylosing spondylitis.

• Juvenile idiopathic arthritis in children two years or older.

• Plaque psoriasis in patients four years or older.

• Psoriatic arthritis.

Mechanism of Action:

Etanercept is a biological tumor necrosis factor (TNF) inhibiting agent. The drug is a Tumor necrosis factor (TNF) soluble receptor. Moreover, it also binds to TNF-alpha and TNF-beta. Etanercept acts by blocking the effects of TNF-alpha, a pro-inflammatory cytokine that increases in rheumatoid arthritis, psoriatic arthritis, psoriasis, juvenile idiopathic arthritis and ankylosing spondylitis.

TNF is a cytokine involved in inflammation and the immune response that binds to TNF receptor 1 (TNFR1) or TNF receptor 2 (TNFR2). Tumor necrosis factor activates essential inflammatory pathways and binds to TNFR1 or TNFR2.

Drug Interactions with Etanercept:

Some important etanercept drug interactions include:

• Methotrexate: If you are already using Methotrexate for rheumatoid arthritis, using Etanercept alongside it can help to manage the condition more effectively. However, be aware of the potential for increased side effects when combining these medications.

• Immunosuppressive Drugs: Combining Etanercept with other immunosuppressive medications like Azathioprine or Cyclophosphamide can increase the risk of infections.

• Live Vaccines: Taking live vaccines while on Etanercept is generally not recommended because the medication suppresses the immune system, making it harder for the body to respond effectively to vaccines.

• Alcohol: Although there are no direct Etanercept drug interactions with alcohol, drinking excessively while using Etanercept can exacerbate some side effects, especially liver-related issues.

Administration

For rheumatoid Arthritis, Psoriatic Arthritis, and Ankylosing Spondylitis:

• 50 milligrams is injected once a week.

• 25 milligrams, an alternative dose, is administered subcutaneously twice weekly, with 72 to 96-hour intervals between the injections.

For Psoriasis:

• 50-milligram dose twice weekly for three months, followed by 50 milligrams once a week.

For Children with Juvenile Idiopathic Arthritis:

• The dosage is 0.8 milligrams per kg once a week, up to 50 milligrams.

• Etanercept is administered through subcutaneous injection, usually on the thigh, upper arm, and lower abdomen.

• The injection must not be administered within the two-inch region around the navel. Injections must be administered around one inch away from previous injection sites. The medication comes in an automatic injection device, pre-filled syringe, or multiple-dose vial.

Contraindications

• Sepsis.

• Hypersensitive reaction to the medication ingredients.

• Herpes zoster infection.

• Active bacterial infections, including active or latent tuberculosis.

• Untreated Hepatitis B or C infection.

• Active invasive fungal infections.

Adverse Effects:

• Injection site reactions include erythema, itching, swelling, pain, bleeding, and bruising.

• Infection of upper respiratory tract infections, including viral, bacterial, and fungal infections.

Warnings and Precautions:

1. Malignancies: Malignancies have been reported in patients taking Etanercept, particularly adolescents and children. The most frequently occurring cancers include lymphomas and melanoma, followed by other skin cancers. The exact relation between malignancies and Etanercept has not been understood yet. The clinical trials and other data indicate an increased incidence of malignancies in patients taking Etanercept as compared to the normal population. However, it must be noted that rheumatoid arthritis alone correlates with increased lymphoma and leukemia rates.

2. Infections: Patients taking Etanercept are at an increased risk of developing severe and deadly infections, like reactivation of latent tuberculosis or developing active tuberculosis. Infections were more frequent in patients receiving adjunct immunosuppressive drugs, like Methotrexate or corticosteroids. There are cases of viral, bacterial, and fungal infections, including opportunistic infections. Doctors must advise antifungal therapy for patients living or traveling to areas endemic to invasive fungal infections. Doctors must be cautious while prescribing Etanercept, including immunocompromised patients, elderly patients, those exposed to endemic mycoses or tuberculosis, and patients with a history of opportunistic infections.

Toxicity:

No dose-limiting toxicities have been observed during clinical trials, in vivo, and in vitro studies. The long-term toxicity of Etanercept treatment is still unknown.

Involvement of Healthcare Professionals:

The doctors must weigh the risks and benefits of prescribing Etanercept as a treatment, including drug cost, method of administration, effectiveness, and adverse effects. Etanercept is one of the options for treating rheumatoid arthritis, plaque psoriasis, ankylosing spondylitis, juvenile idiopathic arthritis, and psoriatic arthritis. Etanercept usage has serious side effects such as malignancies, infections, and autoimmune conditions as it acts biologically.

To provide the best healthcare facilities, an interprofessional team approach must properly diagnose, manage and treat patients with mental disorders. The interprofessional team approach includes clinicians, nurses, mid-level practitioners, therapists, pharmacists, and patients. This team helps the patients understand their illness and encourages them to take the treatment.

Before initiating the treatment, the doctors must know the guidelines regarding Etanercept, like monitoring the patient for signs of heart failure, hepatitis B, tuberculosis, and other infections. Clinicians must give the patients proper instructions to the patients regarding injecting the medicine at home. Clinicians and pharmacists must inform the patient about drug interactions and possible adverse effects.