Iontophoresis potentially may be a good alternative to improved delivery of corticosteroids. Study Investigators propose to use iontophoresis to increase dexamethasone delivery into thick psoriasis plaques. The primary purpose of this study is to assess whether dexamethasone sodium phosphate iontophoresis is an effective local therapy for psoriasis. The objective of the study is to determine the efficacy of dexamethasone sodium phosphate iontophoresis for psoriasis.
Subjects who meet the selection criteria will be offered an opportunity to take part in this study. This will be a prospective controlled study. After written informed consent, 20 subjects with symmetric thick plaque psoriasis lesions on the extremities and/or trunk will be enrolled and randomized to receive one activated iontophoresis patch containing dexamethasone sodium phosphate and another inactive control iontophoresis patch containing dexamethasone sodium phosphate on each limb containing a thick psoriatic plaque. Members of the research team will apply the patches. After application of the patch, subjects will be asked to return to the clinic in 1 week and 2 weeks. Efficacy will be measured at the 1-week and 2-week follow-up visit using a scale for erythema, scale, and thickness called the static Physician Global Assessment (sPGA) and subject satisfaction to treatment will be measured at the 2 week-follow-up using the PsoSat Questionnaire.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Iontophoresis is a drug delivery system that uses electromigration and electro-osmosis to move charged molecules. Electromigration is the movement of ions across the skin by an electrical field. Positive ions move away from a cathode (positive charge) and towards an anode (negative charge). Negative ions move away from an anode and towards a cathode. Electro-osmosis is the volume movement of positive ions away from the opposite charge. Since skin is negatively charge, positively charged ions penetrate deep in the tissue from the negatively charged skin. 4 The use of iontophoresis was incorporated into medicine in efforts to increase the penetration of medications and avoid injection procedures. Dexamethasone sodium phosphate 4 mg/mL vial will be used in the study. Using a syringe, 2 cc of dexamethasone will be drawn and poured onto the designated medication site on the iontophoresis patch. Once the medication is poured, the patch will be applied on the skin and turned on.
Iontophoresis is a drug delivery system that uses electromigration and electro-osmosis to move charged molecules. Electromigration is the movement of ions across the skin by an electrical field. Positive ions move away from a cathode (positive charge) and towards an anode (negative charge). Negative ions move away from an anode and towards a cathode. Electro-osmosis is the volume movement of positive ions away from the opposite charge. Since skin is negatively charge, positively charged ions penetrate deep in the tissue from the negatively charged skin. 4 The use of iontophoresis was incorporated into medicine in efforts to increase the penetration of medications and avoid injection procedures. Inactive medication will be used in the study. Using a syringe, 2 cc of inactive medication will be drawn and poured onto the designated medication site on the iontophoresis patch. Once the medication is poured, the patch will be applied on the skin and turned on.
Wake Forest University Health Sciences
Winston-Salem, North Carolina, United States
Static Physician Global Assessment baseline
Static Physician Global Assessment of severity integrates all lesions for overall score. This measure is commonly used as a quick way to quantify disease severity both for clinical studies and non-clinical studies. Scores range from 0=clear to 5=very severe disease. Lower scores denote better outcomes.
Time frame: Baseline
Static Physician Global Assessment Week 1
Static Physician Global Assessment of severity integrates all lesions for overall score. This measure is commonly used as a quick way to quantify disease severity both for clinical studies and non-clinical studies. Scores range from 0=clear to 5=very severe disease. Lower scores denote better outcomes.
Time frame: Change from Baseline to Week 1
Static Physician Global Assessment Week 2
Static Physician Global Assessment of severity integrates all lesions for overall score. This measure is commonly used as a quick way to quantify disease severity both for clinical studies and non-clinical studies. Scores range from 0=clear to 5=very severe disease. Lower scores denote better outcomes.
Time frame: Change from Week 1 to Week 2
PsoSat Questionnaire
PsoSat Questionnaire measures patient satisfaction to treatment. This measure was validated. PsoSat Questionniare consists of 8 items that are measured on a 5-item Likert scale. 0= poor agreement to 4= perfect agreement. Higher scores denote better outcome.
Time frame: Measured at Week 2
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Dexamethasone sodium phosphate 4 mg/mL vial will be used in the study. Using a syringe, 2 cc of dexamethasone will be drawn and poured onto the designated medication site on the iontophoresis patch. Once the medication is poured, the patch will be applied on the skin and turned on.