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S-Caine™ Peel (lidocaine 7% and tetracaine 7% cream) is a new skin numbing cream made of lidocaine and tetracaine. The purpose of this study is to evaluate and measure the length of time the S-Caine Peel numbs the skin, when applied for 30 and 60 minutes.
This was a single center, randomized, double-blind, placebo controlled, paired study that evaluated the duration of anesthetic effect produced by S-Caine Peel when applied for 30 or 60 minutes in 40 adult volunteers. A pinprick test was used to determine duration of anesthetic effect.
At the procedure visit, subjects were to be assigned the lowest available sequential subject number. Treatment was randomized according to a computer-generated randomization schedule provided by the sponsor. The randomization to application time of 30 or 60 minutes was to be 1:1 and un-blinded. The randomization of study drug to treatment area (concurrent applications of either S Caine Peel applied to the anterior surface of the right thigh with placebo applied to the anterior surface of the left thigh, or placebo applied to the anterior surface of the right thigh and S-Caine Peel applied to the anterior surface of the left thigh) was 1:1 and double-blind. Instructions for implementing the randomization (ie, the correct application time and treatment area) appeared on the study drug labels assigned to each subject number.
Subjects were administered both S-Caine Peel and placebo on separate thighs for either 30 or 60 minutes. The study drugs were applied concurrently to the anterior surfaces of the right and left thigh (one application per thigh, with study drug applied to the right thigh first, followed immediately by application of the alternate study drug to the left thigh). Each study drug was dispensed to cover a 200 cm² treatment area with a uniform thickness of approximately 1 mm
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| S-Caine Peel | Experimental |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| S-Caine™ Peel (lidocaine and tetracaine cream 7%/7%) | Drug | S-Caine Peel is composed of a 1:1 eutectic mixture of 7% lidocaine, and 7% tetracaine, which was applied topically. The S Caine Peel was applied at approximately 1 mm in thickness and remained on the treatment area for 30 or 60 minutes |
| Measure | Description | Time Frame |
|---|---|---|
| Duration of anesthetic effect | The duration of anesthesia was defined as the difference between the onset and end of anesthesia. If there was no onset of anesthesia, the duration was defined as zero. Onset of anesthesia was defined as the first time that the number of painful pinpricks was 2 or less (out of 5) for 2 consecutive time points. For subjects/treatments with onset of anesthesia, the end of anesthesia was defined as the first time after onset when the number of painful pinpricks was 3 or more for 2 consecutive time points | first time after onset when the number of painful pinpricks was 3 or more for 2 consecutive time points |
| Measure | Description | Time Frame |
|---|---|---|
| Number of participants with adverse events | To monitor the nature and frequency of adverse events (AEs) associated with the application of S-Caine Peel | 72 hours |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| William Garland, MD | Radiant Research San Diego | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Radiant Research | San Diego | California | 92123 | United States |
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| ID | Term |
|---|---|
| D010146 | Pain |
| ID | Term |
|---|---|
| D009461 | Neurologic Manifestations |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
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| ID | Term |
|---|---|
| D008012 | Lidocaine |
| ID | Term |
|---|---|
| D000083 | Acetanilides |
| D000813 | Anilides |
| D000577 | Amides |
| D009930 | Organic Chemicals |
| D000814 |
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|
|
| Aniline Compounds |
| D000588 | Amines |