Metoxaleno Macopharma (Methoxsalen)

Methoxsalen, the active ingredient in Metoxaleno Macopharma, is a psoralen presented as a pharmaceutical preparation for extracorporeal use. It is employed in the management of certain chronic skin disorders, primarily in adult patients requiring phototherapy.

GNH USA supplies Metoxaleno Macopharma as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Methoxsalen is a psoralen that modulates skin cell proliferation and immune response in phototherapy‑based treatments.

- Psoriasis: reduces plaque formation and scaling when combined with UVA exposure. - Vitiligo: promotes repigmentation of depigmented patches by stimulating melanocyte activity. - Cutaneous T‑cell lymphoma (rare): may be used as adjunctive therapy in selected cases.

Methoxsalen may cause a range of adverse reactions, most of which are related to its photosensitizing properties.

Common Side Effects: - Nausea: mild to moderate gastrointestinal upset. - Headache: transient cranial discomfort. - Erythema: redness of treated skin areas. - Pruritus: itching at exposure sites. - Hyperpigmentation: darkening of skin where UVA was applied.

Serious or Rare Side Effects: - Severe phototoxic reaction: blistering or ulceration of skin. - Stevens‑Johnson syndrome: extensive mucocutaneous lesions. - Liver toxicity: elevated transaminases. - Hematologic abnormalities: anemia or leukopenia. - Ocular toxicity: cataract formation with prolonged exposure.

Methoxsalen requires careful patient assessment and monitoring to minimize risks.

- Assess skin type: evaluate susceptibility to phototoxic reactions before therapy. - Avoid sun exposure: limit natural UV exposure during treatment periods. - Monitor liver function: perform baseline and periodic hepatic enzyme tests. - Review concomitant photosensitizing drugs: adjust therapy if other agents increase UV sensitivity. - Use protective eyewear: wear UVA‑blocking glasses during exposure. - Store at ambient temperature: keep in original container, protect from moisture and light.

Methoxsalen can interact with several medication classes, altering its safety profile.

Major Interactions (Avoid): - Other psoralens: additive phototoxicity. - Systemic retinoids: increased risk of severe skin reactions. - Tetracyclines: enhanced photosensitivity. - Phenothiazines: heightened UV‑induced skin damage. - Thiazide diuretics: potential for exaggerated phototoxic response.

Moderate Interactions (Monitor Closely): - NSAIDs: may increase skin irritation. - Antihistamines: can mask early signs of phototoxicity. - Oral contraceptives: possible alteration of drug metabolism.