a study to assess therapeutic equivalence between test emla patch with marketed emla patch in healthy subjects.

Conditions: Pain

Summary: a double-blind, randomized, 2-period, placebo-controlled, single-center, crossover study, efficacy study demonstrating the therapeutic equivalence of the test cellulose disc (matrix) in emla patch and the current commercial cellulose disc (matrix) in emla patch in healthy subjects.

this study will be a double-blind, randomized, 2-period, placebo-controlled, crossover study in healthy male and female subjects, performed at a single study center. prior to inclusion, informed consent will be obtained. a brief medical history, including limited demographic data (gender, age and ethnicity) will be recorded, and eligibility for inclusion to the study will be established through a physical inspection of hands. subjects will be shown how to complete the vas. visual analogue scale (vas) as a research tool is frequently used for the assessment of pain severity and relief. vas is easy to use and can be applied in a variety of settings; results are reproducible. vas data are sensitive to treatment effects and can be analyzed using parametric statistical techniques. at each specific study visit, each subject will undergo a left-right comparison of two patch preparations, followed by a repeated test with an alternate combination of preparations. thus, the study will comprise: visit 1: emla test patch plus placebo patch or emla test patch plus emla current reference patch. visit 2: emla test patch plus emla current reference patch or emla test patch plus placebo patch. there will be a washout period of at minimum of 4 calendar days between treatment periods (visits). no follow-up visit is needed. any adverse event (ae) that is ongoing at the last visit will be followed up as appropriate.

Eligibility criteria:
inclusion criteria: 1. provision of signed and dated, written informed consent prior to any study specific procedures. 2. healthy male and female subjects aged 18 to 60 years. 3. have healthy skin over hands, with no inflammation or open wounds. 4. able to understand, read and speak the german language. 5. easy accessible veins on the dorsum of both hands. exclusion criteria: 1. current significant active skin disease such as widespread eczema or active atopic dermatitis. 2. history of severe allergy/hypersensitivity or ongoing allergy/hypersensitivity, as judged by the pi, to local anesthetics of the amide type or to any of the components of the emla emulsion (e.g., castor oil polyoxyl hydrogenated). 3. history of severe allergy/hypersensitivity or ongoing allergy/hypersensitivity, as judged by the pi to chlorohexidine (preservative in the placebo patch emulsion). 4. subjects who previously entered this study. 5. involvement of any astrazeneca, parexel or study site employee or their close relatives. 6. judgement by the pi that the subject should not participate in the study if they have any ongoing or recent (i.e., during the screening period) minor medical complaints that may interfere with the interpretation of study data or are considered unlikely to comply with study procedures, restrictions, and requirements. 7. vulnerable subjects, e.g., kept in detention, protected adults under guardianship, trusteeship, or committed to an institution by governmental or juridical order.

Keywords: dermal anesthesia. venipuncture and intravenous cannulation. skin blanching or erythema. phase i. therapeutic equivalence. eutectic mixture of local anaesthetics (emla)