Olumiant (Baricitinib): Uses, Side Effects, Dosage & More

Understanding Olumiant (Baricitinib)

Olumiant, with the active ingredient baricitinib, is a prescription medication used to treat specific autoimmune and inflammatory conditions. It is available in tablet form and belongs to a class of drugs known as Janus kinase (JAK) inhibitors. Currently, Olumiant is only available as a brand-name drug, with no generic version on the market.

Primary Uses of Olumiant

Olumiant is approved for the treatment of several conditions:

• Moderate to Severe Rheumatoid Arthritis (RA): For adults whose condition has not adequately responded to other treatments, such as tumor necrosis factor (TNF) blockers. It targets active RA symptoms like inflammation, pain, and stiffness, primarily affecting joints in the hands, feet, and wrists.
• Severe Alopecia Areata: An autoimmune condition causing significant hair loss (50% or more) on the scalp or body.
• Severe COVID-19: Used in hospitalized patients requiring respiratory support, in conjunction with other treatments like oxygen therapy or ventilation.

While approved for these uses, Olumiant may be prescribed off-label for other conditions. For instance, it is approved in some countries for atopic dermatitis (eczema), and research is ongoing regarding its potential use for lupus and psoriasis.

How Olumiant Works

Olumiant functions by blocking the activity of Janus kinase, a protein that acts as a messenger in the immune system. By inhibiting Janus kinase, Olumiant helps to interrupt the signaling pathways that lead to inflammation. This mechanism helps to reduce the symptoms associated with rheumatoid arthritis, alopecia areata, and severe COVID-19. It is important to note that Olumiant is a chemically manufactured drug, not a biologic, which are drugs made from living cells.

Dosage and Administration

Olumiant is typically taken once daily as an oral tablet. It is available in strengths of 1 mg, 2 mg, and 4 mg. The specific dosage depends on the condition being treated and individual patient factors. For severe COVID-19, a 4 mg daily dose is common, usually for up to 14 days or until hospital discharge. For alopecia areata, treatment may start at 4 mg daily for significant hair loss, potentially reducing to 2 mg, or starting at 2 mg and increasing to 4 mg if needed. For RA, dosages are determined by a healthcare professional.

If a dose is missed, it should be taken as soon as remembered, unless it is almost time for the next dose, in which case the missed dose should be skipped. Olumiant tablets should generally be swallowed whole, though they can be dissolved in water for patients with swallowing difficulties, particularly in hospital settings for COVID-19 treatment. It can be taken with or without food.

Potential Side Effects

Like all medications, Olumiant can cause side effects, which can range from mild to serious. Common mild side effects include nausea and upper respiratory infections (such as the common cold). These often resolve within a few days or weeks.

Serious Side Effects and Boxed Warnings

Olumiant carries several boxed warnings from regulatory authorities due to the potential for serious adverse effects:

• Serious Infections: Olumiant suppresses the immune system, increasing the risk of severe infections, including tuberculosis (TB), which can be life-threatening. Patients are typically screened for TB and other infections before starting treatment.
• Blood Clots: There is a rare risk of developing blood clots, such as deep vein thrombosis (DVT) in the leg or pulmonary embolism (PE) in the lung.
• Cancer: Immunosuppression can increase the risk of certain cancers, including non-melanoma skin cancer and lymphoma.
• Serious Heart-Related Events: Although not directly observed with Olumiant, similar drugs have shown an increased risk of heart attack and stroke. Due to its similar mechanism, Olumiant carries this theoretical risk.
• Increased Risk of Death: Similar to heart-related events, studies with comparable medications have indicated an increased risk of death, leading to a boxed warning for Olumiant.
• Gastrointestinal Perforation: In rare cases, Olumiant can cause holes in the stomach or intestines, particularly in individuals with a history of diverticulitis or ulcers, or those taking certain other medications like NSAIDs or corticosteroids.

Other serious side effects reported include low red or white blood cell levels, high cholesterol, herpes outbreaks, and elevated liver enzyme levels, which may indicate liver damage. Patients should promptly report any concerning symptoms to their doctor.

Important Considerations Before Treatment

Before starting Olumiant, a thorough discussion with a healthcare provider is crucial, covering medical history, existing conditions, and all current medications, including over-the-counter drugs, vitamins, and supplements.

Drug Interactions

Olumiant can interact with several types of drugs. It is generally not prescribed with other biologic disease-modifying antirheumatic drugs (bDMARDs), certain immunosuppressants (like azathioprine or cyclosporine), or other JAK inhibitors. The gout medication probenecid can also interact with Olumiant.

Vaccinations

Live vaccines should be avoided during Olumiant treatment due to the weakened immune system, which could lead to serious infection. Examples of live vaccines include chickenpox, MMR, and nasal spray flu vaccines. Inactivated vaccines, such as the injectable flu vaccine and COVID-19 vaccines, are generally safe.

Specific Health Conditions

Patients with an active infection, a history of tuberculosis or hepatitis B/C, kidney or liver problems, low blood cell counts, or a history of diverticulitis or stomach/intestinal ulcers may require careful monitoring or dosage adjustments. Olumiant is not recommended for individuals with severe kidney problems or those with a known allergic reaction to the drug or its ingredients.

Alcohol, Pregnancy, and Breastfeeding

While no direct interaction between alcohol and Olumiant is known, both can cause nausea, potentially increasing this side effect. It is not known if Olumiant is safe during pregnancy, and it is not recommended for use while breastfeeding due to potential risks to the infant.

Cost of Olumiant

The cost of Olumiant can vary significantly based on insurance coverage, treatment plan, and other factors. For COVID-19 treatment administered in a hospital, costs may be discussed with the medical team or insurance provider. Patients can also explore manufacturer support programs.