Melanocyl

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What Is Melanocyl?

Melanocyl is an oral tablet containing methoxsalen 10 mg (also known as 8-methoxypsoralen or 8-MOP), manufactured by Elder Pharmaceuticals. Methoxsalen is a naturally occurring furocoumarin originally extracted from the seeds of Ammi majus (bishop’s weed) and has been used in dermatology since the 1970s in the form of PUVA photochemotherapy (psoralen + ultraviolet-A).

Methoxsalen by itself is inert — it becomes pharmacologically active only when the skin is exposed to UVA light (320–400 nm). The UVA-activated psoralen binds DNA in cells within the irradiated skin and crosslinks pyrimidine bases, which suppresses cell proliferation (the mechanism for psoriasis), repigments vitiligo by stimulating melanocyte migration, and has a cytotoxic effect on skin-infiltrating T-lymphocytes (the mechanism for mycosis fungoides).

Approved / Evidence-Based Uses

• Vitiligo (extensive, stable, non-segmental type) — oral PUVA stimulates perifollicular melanocyte migration; response rates 40–75% over 12–24 months of treatment. Often combined with topical steroid or tacrolimus for localised vitiligo.
• Plaque psoriasis (moderate to severe, >10% body surface) — oral PUVA still used when narrowband UVB or biologics have failed or are not available.
• Mycosis fungoides (cutaneous T-cell lymphoma, early-stage) — first-line dermatology treatment.
• Severe atopic dermatitis refractory to topical therapy — less common now given modern systemic options (dupilumab, JAK inhibitors).
• Palmoplantar pustulosis and severe hand / foot dermatitis
• Polymorphic light eruption — used prophylactically as a spring-time desensitising protocol (paradoxical but effective).
• Graft-versus-host disease (extracorporeal photopheresis protocol)

Not an appropriate treatment for: rosacea, acne, simple eczema (topicals first), hyperpigmentation (methoxsalen worsens pigmentation through stimulation of melanocytes), melasma.

Melanocyl Dosage & Treatment Protocol

Methoxsalen is a specialist dermatology medicine used as part of a controlled UVA-exposure protocol. It is not for independent or self-directed use — PUVA treatment requires a UVA light cabinet (found in dermatology centres or home-unit rental programmes with dermatology supervision) and careful monitoring of cumulative UVA dose, joule-per-square-centimetre records, and skin surveillance.

Typical oral protocol:

• Dose: 0.4–0.6 mg/kg body weight, taken 2 hours before the UVA session
• Frequency: 2–3 treatments per week, non-consecutive days
• UVA dose: individualised to skin type; start low (0.5–1 J/cm² for skin type I-II, up to 3 J/cm² for type IV-VI) and titrate up in 10–20% increments per session
• Session duration: seconds to minutes depending on lamp intensity and target dose
• Total course: 20–50 sessions for psoriasis, 100–300 sessions for vitiligo
• Maximum lifetime cumulative UVA: approximately 1,000–1,500 J/cm² (or 200 sessions) — above this, skin-cancer risk starts to matter measurably

Every dose must be followed by 24-hour photoprotection:

• UVA-blocking wrap-around sunglasses for 24 hours after each dose — mandatory, even indoors near windows. Methoxsalen-induced cataract is a real, documented complication of skipped eyewear.
• Broad-spectrum sunscreen SPF 50+ on any non-target skin
• Long sleeves, trousers, wide-brimmed hat when outdoors
• Avoid sunbeds, tanning booths, welding arcs on PUVA days

Take each dose with food, milk, or a fatty snack to reduce nausea — the most common acute side effect.

Bijwerkingen

Acute (commonly in the first weeks):

• Misselijkheid (up to 20% of users) — reduce by taking with food or splitting dose if necessary
• Pruritus (post-PUVA itch) — transient; antihistamine helps
• Erythema / sunburn-like reaction — indicates over-exposure; UVA dose needs reduction
• Headache, dizziness
• Insomnia, anxiety (rare; stimulant-like effect)

Sub-acute (weeks to months):

• PUVA-induced tanning (expected; fades over weeks to months after treatment stops)
• PUVA lentigines (freckle-like dark spots, particularly on the trunk)
• Photoageing — earlier wrinkles, elastosis, telangiectasia
• Hypertrichosis (increased fine hair growth)
• Onycholysis (nail separation)

Long-term risks at high cumulative exposure:

• Non-melanoma skin cancer — squamous cell carcinoma risk rises with cumulative UVA dose; becomes clinically significant above ≈200 treatments or 1,000 J/cm² lifetime total
• Melanoma — elevated risk at very high cumulative exposures (>250 treatments); long latency (15–25 years)
• Cataract from inadequate eye protection during the 24-hour photosensitive window
• Depressed cell-mediated immunity in the short term post-session (rarely clinically relevant)

Contra-indicaties

• Photosensitivity disorders — lupus erythematosus, porphyria, xeroderma pigmentosum, Bloom syndrome, Cockayne syndrome
• Pregnancy (Category C — teratogenic in animals) and breastfeeding
• Kinderen onder de 12
• Active skin cancer or melanoma history
• Hepatic impairment (methoxsalen is metabolised in the liver)
• Severe renal or cardiovascular disease
• Cataract (unless fully lens-replaced)
• Previous treatment with arsenic or ionising radiation (significantly raises cutaneous carcinogenesis risk)
• Known hypersensitivity to psoralens or furocoumarins

Food and Drug Interactions

Psoralens are photosensitisers. Any other photosensitising agent taken simultaneously stacks risk:

• Tetracyclines, fluoroquinolones, sulfonamides
• Amiodarone, hydrochlorothiazide, furosemide
• NSAIDs (piroxicam)
• Phenothiazines
• Sint-janskruid
• Retinoids

Dietary furocoumarin-rich foods (celery, parsley, parsnips, figs, citrus peel) can also worsen phototoxicity; minimise on treatment days.

Opslag

Store below 25°C in original blister pack. Protect from light and moisture. Keep out of reach of children.

Veelgestelde vragen

Can I use Melanocyl for rosacea?

Nee. Methoxsalen is a photosensitiser and a PUVA agent — it has no role in rosacea. UV-triggered flushing is in fact a known trigger of rosacea, so methoxsalen-induced photosensitivity could worsen rosacea. For rosacea, see the first-line options — topical ivermectin, azelaic acid, brimonidine gel.

Can I do PUVA at home?

Home PUVA units exist, usually on rental through dermatology services, but self-directed PUVA without dermatology supervision is strongly discouraged. The cumulative UVA dose needs tracking, skin surveillance for new atypical lesions is essential, and dose adjustments based on erythema response are part of the protocol. Starting PUVA without dosimetry is the main route to acute burns, eye injury, and accelerated skin-cancer risk.

Hoelang duurt het voordat ik resultaten zie?

Psoriasis: measurable improvement at 8–12 sessions; clearance at 20–30 sessions. Vitiligo: first repigmentation at 30–50 sessions; meaningful cosmetic repigmentation at 100–200 sessions over 6–12 months. Mycosis fungoides: early-stage response within 10–20 sessions. Response rates and durability vary by skin type, body site, and disease severity.

Why do I need to wear sunglasses for 24 hours?

Methoxsalen circulates in the lens of the eye for about 24 hours after each dose. During that window, ambient UVA light (even ordinary sunlight through a window) can photo-activate the psoralen inside the lens and cross-link lens proteins, causing cataract. UVA-blocking wrap-around sunglasses during the 24-hour window are not optional — they are the only protection.

Is PUVA still used in 2026?

Less than it was. Narrowband UVB (311 nm) has replaced PUVA as first-line phototherapy for most plaque psoriasis and many vitiligo patients — similar efficacy with substantially lower skin-cancer risk, no need for oral psoralen, and no photosensitive window. PUVA remains useful for mycosis fungoides, severe unresponsive psoriasis, vitiligo that has not responded to NB-UVB, and palmoplantar disease.

Can I take Melanocyl if I’m pregnant?

No. Methoxsalen is FDA Pregnancy Category C; it is teratogenic in animal studies. Avoid in pregnancy and while breastfeeding. For vitiligo or psoriasis in pregnancy, topical corticosteroid therapy under dermatology guidance or narrowband UVB (without psoralen) is the appropriate option.

What are the alternatives to PUVA for vitiligo?

Narrowband UVB (311 nm) phototherapy, topical calcineurin inhibitors (tacrolimus 0.1%), topical steroid (short-course), JAK inhibitors (ruxolitinib 1.5% cream, FDA-approved 2022 for non-segmental vitiligo). Surgical techniques (melanocyte transplantation) for stable segmental vitiligo.

Where can I buy Melanocyl online?

You can buy Melanocyl (methoxsalen 10 mg tablets) from MedsBase with discreet packaging and worldwide shipping.PUVA is a specialist dermatology treatment — use under dermatologist supervision with proper UVA dosimetry and ocular protection.

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