8-MOP (Methoxsalen, 8-Methoxypsoralen) Capsules, 10mg. Methoxsalen is a naturally occurring photoactive substance found in the seeds of the Ammi majus (Umbelliferae) plant and in the roots of Heracleum Candicans. It belongs to a group of compounds known as psoralens, or furocoumarins.
8-MOP is indicated for the follwoing:
Photochemotherapy (methoxsalen with long wave UVA radiation) is indicated for the symptomatic control of severe, recalcitrant, disabling psoriasis not adequately responsive to other forms of therapy and when the diagnosis has been supported by biopsy. Photochemotherapy is intended to be administered only in conjunction with a schedule of controlled doses of long wave ultraviolet radiation.
Photochemotherapy (methoxsalen with long wave ultraviolet radiation) is indicated for the repigmentation of idiopathic vitiligo.
Photopheresis (methoxsalen with long wave ultraviolet radiation of white blood cells) is indicated for use with the UVAR* System in the palliative treatment of the skin manifestations of cutaneous T-cell lymphoma (CTCL) in persons who have not been responsive to other forms of treatment. While this dosage form of methoxsalen has been approved for use in combination with photopheresis, Oxsoralen Ultra® Capsules have not been approved for that use.
Published Studies Related to 8-MOP (Methoxsalen)
Oral vs. bath PUVA using 8-methoxypsoralen for chronic palmoplantar eczema. [2009.04]
BACKGROUND: Both oral and bath PUVA with 8-methoxypsoralen (8-MOP) have been shown to be effective in the treatment of chronic palmoplantar eczema. However, most studies were retrospective and did not include longer follow-up periods. AIM: To compare the therapeutic efficacy, tolerability and duration of remission after oral vs. bath PUVA using 8-MOP in patients with chronic palmoplantar eczema... CONCLUSION: Oral PUVA is preferable for patients with hyperkeratotic eczema and bath PUVA for patients with dyshidrotic eczema.
Randomized, double-blind comparison of 1 mg/L versus 5 mg/L methoxsalen bath-PUVA therapy for chronic plaque-type psoriasis. [2006.10]
BACKGROUND: Bath-psoralen plus ultraviolet A (PUVA) radiation therapy is increasingly replacing oral PUVA because of its superior short- and long-term safety profile. Several investigations in recent years have led to a refinement of the bath-PUVA protocol; however, the optimal therapeutic concentration of methoxsalen in the bath water has as yet not been delineated. OBJECTIVES: The therapeutic efficacy and tolerability of bath-PUVA by using two different dilutions of methoxsalen (1 mg/L vs 5 mg/L or 0.0001% vs 0.0005%) were compared in 46 patients with chronic plaque-type psoriasis in a prospective, randomized, double-blind study... CONCLUSIONS: Our data indicate that in bath-PUVA treatment the use of a high (5 mg/L) methoxsalen concentration is substantially more effective in clearing chronic plaque-type psoriasis than a low (1 mg/L) concentration.
Narrowband UV-B (TL-01) phototherapy vs oral 8-methoxypsoralen psoralen-UV-A for the treatment of chronic plaque psoriasis. [2003.03]
OBJECTIVE: To compare the efficacy of narrowband UV-B (TL-01) phototherapy with oral 8-methoxypsoralen photochemotherapy (8-MOP psoralen-UV-A [PUVA]) in patients with chronic plaque psoriasis (CPP)... CONCLUSION: Narrowband UV-B phototherapy, used 3 times weekly, is as effective for the treatment of CPP as oral 8-MOP PUVA used twice weekly.
Time course of 8-methoxypsoralen concentrations in skin and plasma after topical (bath and cream) and oral administration of 8-methoxypsoralen. [2002.03]
BACKGROUND: The combination of 8-methoxypsoralen with ultraviolet A exposure (PUVA therapy) is a standard treatment for a variety of dermatoses. The following three variants have been described: oral, bath, or cream PUVA. To achieve optimal therapeutic effects, ultraviolet A irradiation should be performed at the time of maximum photosensitivity, that is, at the time of maximum 8-methoxypsoralen tissue concentrations... CONCLUSIONS: The time course of tissue concentrations corresponds closely with the time course of minimal phototoxic doses found in previous studies. Because tissue concentrations after topical administration of 8-methoxypsoralen (bath and cream) were high compared with plasma concentrations and because they were less variable and occurred at better predictable time points than those after oral administration, we suggest that topical PUVA is superior to systemic PUVA, at least from a pharmacokinetic point of view.
A comparison of bathwater and oral delivery of 8-methoxypsoralen in PUVA therapy for plaque psoriasis. [2000.03]
Bath-PUVA is an alternative to oral-PUVA for the treatment of psoriasis. This study compares the effectiveness of the two methods in two groups, each consisting of 17 patients with plaque psoriasis... It is suitable for those taking other systemic medications and we recommend it as a valuable therapeutic option that should be available at all treatment centres.
Clinical Trials Related to 8-MOP (Methoxsalen)
A Safety and Efficacy Study of Uvadex and Extracorporeal Photopheresis (ECP) in Chronic Graft Versus Host Disease [Recruiting]
The purpose of this study is to evaluate the safety and effectiveness of extracorporeal
photopheresis therapy when added to standard drug therapies administered to patients with
moderate to severe chronic graft-versus-host disease.
Fumaric Acid Ester-PUVA Therapy Versus Acitretin -PUVA Therapy in Pustular Palmoplantar Psoriasis [Recruiting]
The purpose of this prospective, randomized, controlled, single-blinded investigation is to
study the efficacy, tolerability and safety of oral photochemotherapy (PUVA) combined with
acitretin versus oral PUVA combined with systemic fumaric acid esters (FAE) in patients with
pustular palmoplantar psoriasis.
Patients will be randomized and allocated in concealed manner to one of the two treatment
arms: acitretin-PUVA or FAE-PUVA.
RHIV A Pilot Study Refractory or Intolerant to Highly Active Antiretroviral Therapy (HAART) [Recruiting]
The objectives of this clinical trial are to:
- Assess the safety of using extracorporeal photoimmune therapy with the photosensitizing
agent Uvadex in the treatment of HIV-1 infection;
- Evaluate the effects of this therapy on HIV-1 viral load by polymerase chain reaction
- Evaluate the effects of this therapy on CD4+, CD8+ cells and CD4/CD8 ratio;
- Evaluate the effects of this therapy on the patient's immune system, by skin reactivity
to a standard anergy panel.
PUVA Maintenance Therapy in Mycosis Fungoides [Not yet recruiting]
The purpose of the study is to determine whether psoralen plus UVA (PUVA) photochemotherapy
maintenance treatment prolongs disease-free survival of cutaneous T cell lymphoma (mycosis
Safety and Efficacy Study of Photopheresis With UVADEX to Prevent Graft-Versus-Host Disease [Active, not recruiting]
The purpose of this study is to determine whether Extracorporeal Photopheresis with UVADEX
(ECP) prior to bone marrow or peripheral blood stem cell transplantation is effective in the
prevention of Graft-versus-Host Disease (GvHD).