A Psoriasis Plaque Test Trial With LEO 90100 Compared to Betesil® in Patients With Psoriasis Vulgaris

The purpose of this study is to evaluate the anti-psoriatic effect of LEO 90100 aerosol foam compared with Betesil® medicated plaster

The products will be applied on 6 test sites (each product on 3 test sites) once daily 6 days a week (except Sundays) for 4 weeks. The application sites for each product will be determined according to random assignment. Depending on the size of the psoriasis plaques, 2 or 4 test sites will be located within the same plaque; the treatment assignment will be done pair-wise.

Eligibility Criteria:
Inclusion Criteria:

* Signed and dated informed consent has been obtained
* Subjects with a diagnosis of psoriasis vulgaris with preferably three lesions (plaques) located on arms, legs and/or trunk or at least two lesions (plaques) located on arms, legs and/or trunk. For subjects with three lesions, each lesion must have a size suitable to accommodate 2 test sites (test site area 5 cm2, distance between two test sites at least 2 cm). For subjects with two lesions, one lesion must have a size suitable to accommodate 4 test sites, and the other lesion must accommodate 2 test sites.
* Age 18 years or above
* Outpatients
* Female subjects must be of either

  * non-childbearing potential, i.e. post-menopausal or have a confirmed clinical history of sterility (e.g. the subject is without a uterus or has tubal ligation) or,
  * child-bearing potential provided there is a confirmed negative pregnancy test prior to trial treatment to rule out pregnancy.

Exclusion Criteria:

* Female subjects who are breast feeding
* Systemic treatment with biological therapies, whether marketed or not, with a possible effect on psoriasis vulgaris within the following time periods prior to randomisation:

  * Etanercept - within 4 weeks prior to randomisation and during the trial
  * Adalimumab, infliximab - within 8 weeks prior to randomisation and during the trial
  * Ustekinumab - within 16 weeks prior to randomisation and during the trial
  * Other products - within 4 weeks/5 half-lives prior to randomisation and during the trial (whichever is longer)
* Systemic treatment with all other therapies than biologicals, with a potential effect on psoriasis vulgaris (e.g., corticosteroids, retinoids, immunosuppressants) within the 4-week period prior to randomisation and during the trial
* Subjects using phototherapy within the following time periods prior to randomisation and during the trial:

  * PUVA: 4 weeks
  * UVB: 2 weeks
* Subjects using one of the following topical drugs for the treatment of psoriasis within the 4 week period prior to randomisation and during the trial:

  * Potent or very potent (WHO group III-IV) corticosteroids
* Subjects using one of the following topical drugs for the treatment of psoriasis within 2 weeks prior to randomisation and during the trial:

  * WHO group I-II corticosteroids (except if used for treatment of scalp and/or facial psoriasis)
  * Topical retinoids, Vitamin D analogues, Topical immunomodulators (e.g. calcineurin inhibitors), Tar products, Salicylic acid
* Subjects using emollients on the selected plaques within 1 week before randomisation and during the trial
* Initiation of, or expected changes to concomitant medication that may affect psoriasis vulgaris (e.g., beta blockers, antimalarial drugs, lithium and ACE inhibitors) within 2 weeks prior to the randomisation and during the trial
* Subjects with current diagnosis of guttate, erythrodermic, exfoliative or pustular psoriasis