Alitretinoin

What is Alitretinoin?

Alitretinoin is a prescription medication belonging to a class of drugs known as retinoids. It is a synthetic Vitamin A derivative, naturally occurring in the human body, and plays a crucial role in cell growth and differentiation. Unlike some other retinoids, Alitretinoin is a pan-agonist, meaning it binds to all known retinoic acid receptors (RARs) and retinoid X receptors (RXRs).

Primarily administered orally, Alitretinoin is recognised for its immunomodulatory and anti-inflammatory properties. It is specifically indicated for the treatment of severe chronic hand eczema (CHE) in adults that has not responded to potent topical corticosteroids. Its unique mechanism of action helps to normalise skin cell activity, reducing the persistent inflammation and skin damage characteristic of this debilitating condition.

How Does it Work?

The therapeutic action of Alitretinoin stems from its ability to interact with specific nuclear receptors within cells. As a pan-agonist, it binds to both retinoic acid receptors (RAR-alpha, -beta, -gamma) and retinoid X receptors (RXR-alpha, -beta, -gamma). These receptors are ligand-activated transcription factors that regulate gene expression.

Upon binding, Alitretinoin-receptor complexes enter the cell nucleus and modulate the transcription of genes involved in various cellular processes, including cell proliferation, differentiation, and the immune response. In the context of chronic hand eczema, this modulation leads to several beneficial effects: it reduces the proliferation of keratinocytes (skin cells), decreases the production of pro-inflammatory cytokines, and suppresses the activity of immune cells involved in the inflammatory cascade. By restoring balance to these cellular pathways, Alitretinoin effectively reduces skin inflammation, itching, and redness, promoting the healing of damaged skin.

Medical Uses

The primary and most significant medical use of Alitretinoin is the treatment of severe chronic hand eczema (CHE) in adults. This condition is characterised by persistent inflammation, dryness, cracking, blistering, and itching on the hands, often significantly impacting quality of life and daily activities. It is considered severe when it has proven refractory to standard treatments, particularly potent topical corticosteroids.

Alitretinoin offers a systemic treatment option for patients who have not found relief with topical therapies. Clinical trials have demonstrated its efficacy in reducing the severity and extent of hand eczema, leading to significant improvement in symptoms and skin condition. While its main indication is CHE, its broader retinoid properties suggest potential, though not currently approved, applications in other dermatological conditions involving abnormal cell growth and inflammation, similar to other retinoids.

Dosage

Alitretinoin is typically prescribed as an oral capsule, taken once daily. The standard starting dose for severe chronic hand eczema is usually 10 mg or 30 mg per day, depending on the patient's response and tolerability. It is crucial to take Alitretinoin with a main meal to enhance its absorption, as it is a fat-soluble compound.

The duration of treatment can vary, but a typical course lasts for up to 12 to 24 weeks, or until the hand eczema has cleared or significantly improved. Treatment should be discontinued if the condition has not adequately responded after the recommended duration. Due to the potential for significant side effects and its teratogenic nature, Alitretinoin must only be prescribed by physicians experienced in the use of systemic retinoids, and patients must adhere strictly to the prescribed dosage and monitoring schedule.

Side Effects

Like all medications, Alitretinoin can cause side effects, some of which can be significant. The most common side effects are related to its retinoid activity and include dry skin, dry lips (cheilitis), dry eyes, and nosebleeds. Patients may also experience headache, muscle and joint pain, and fatigue.

More serious side effects require careful monitoring. Alitretinoin is highly teratogenic, meaning it can cause severe birth defects if taken during pregnancy. Therefore, it is absolutely contraindicated in pregnant women and women of childbearing potential must use highly effective contraception before, during, and after treatment. Other potential serious side effects include elevated blood lipid levels (triglycerides and cholesterol), liver enzyme abnormalities, and changes in thyroid function. Patients may also experience photosensitivity, making sun protection essential. Rarely, mood changes, including depression and suicidal ideation, have been reported with systemic retinoids, necessitating careful psychiatric monitoring.

Drug Interactions

When taking Alitretinoin, it is important to be aware of potential drug interactions that could alter its effectiveness or increase the risk of side effects. Concomitant use with other retinoids (including topical retinoids) or Vitamin A supplements should be avoided, as this can lead to an increased risk of hypervitaminosis A symptoms and toxicity.

Tetracycline antibiotics should also be avoided, as their co-administration with retinoids can increase the risk of benign intracranial hypertension (pseudotumor cerebri). Drugs that are potent inhibitors or inducers of the cytochrome P450 (CYP) enzyme system, particularly CYP3A4, may affect Alitretinoin metabolism and plasma concentrations. Patients should inform their healthcare provider about all medications, supplements, and herbal products they are currently taking to avoid adverse interactions.

FAQ

Is Alitretinoin a steroid?

No, Alitretinoin is not a steroid. It is a synthetic Vitamin A derivative belonging to the retinoid class of drugs. While both steroids and retinoids can treat inflammatory skin conditions, they work through different mechanisms.

How long does it take for Alitretinoin to work?

Patients typically start to see improvements within a few weeks of starting treatment. However, significant improvement in severe chronic hand eczema may take several months, with treatment courses often lasting 12 to 24 weeks.

Can Alitretinoin be used during pregnancy?

Absolutely not. Alitretinoin is severely teratogenic and can cause devastating birth defects. Women of childbearing potential must use two effective forms of contraception for at least one month before, during, and for one month after stopping treatment.

What is chronic hand eczema?

Chronic hand eczema (CHE) is a persistent inflammatory skin condition affecting the hands, lasting for more than three months or recurring within 12 months. It causes redness, itching, dryness, cracking, and sometimes blistering, often resistant to conventional topical treatments.

Products containing Alitretinoin are available through trusted online pharmacies. You can browse Alitretinoin-based medications at ShipperVIP or Medicenter.

Summary

Alitretinoin is a vital oral retinoid medication specifically indicated for the treatment of severe chronic hand eczema that has not responded to other therapies. Its mechanism involves modulating gene expression through retinoid receptors, leading to reduced inflammation and normalised skin cell growth. While highly effective, it requires careful patient selection and monitoring due to its potential side effects, most notably its teratogenicity. Patients considering Alitretinoin should have a thorough discussion with their dermatologist to understand its benefits and risks.