Lidocaine Topical System 1.8% vs Lidocaine Patch 5% - Video abstract [ID 237934]

Video abstract of an original research "A Randomized, Open-Label, Bioequivalence Study of Lidocaine Topical System 1.8% and Lidocaine Patch 5% in Healthy Subjects" https://www.dovepress.com/a-randomize..., published in the open access Journal of Pain Research by Jeffrey Gudin, Charles Argoff, Jeffrey Fudin et al.

Purpose: This study was designed to characterize drug delivery with lidocaine topical
system 1.8% vs lidocaine patch 5% through 2 PK studies.

Patients and Methods: Two Phase 1, single-center, open-label, randomized PK studies
were performed in healthy adults. In Study 1, 56 subjects received a single intravenous bolus
of 0.7 mg/kg of lidocaine as a lead-in to allow for the accurate determination of apparent
dose of both products. After a 7-day washout period, subjects were randomized to receive
either lidocaine topical system 1.8% or lidocaine patch 5% for 12 hours followed by another
7-day washout period, after which subjects crossed over to receive the other treatment for 12 hours.

In Study 2, 54 subjects were randomized to receive either lidocaine topical system
1.8% or lidocaine patch 5% for 12 hours. After a 7-day washout period, subjects crossed over
to receive the other treatment. Adhesion and skin irritation assessments were performed after application of the products in Study 2. In both studies, serial blood samples were collected to measure the plasma concentration of lidocaine after product application. Safety assessments and adverse events were monitored in both studies.

Results: The comparative PK analysis demonstrated that the two products, despite their
difference in drug load and strength, are bioequivalent. Both products were well tolerated. In
Study 2, dermal response scores (skin tolerability after removal) were similar between
lidocaine topical system 1.8% and lidocaine patch 5%, with a mean irritation score per
patch <1 (barely perceptible erythema), which is not considered to be clinically significant.

Conclusion: Bioequivalence was demonstrated between lidocaine topical system 1.8% and
lidocaine patch 5%. A comparison of the single-time adhesion scores at 12 hours in Study 2
favored lidocaine topical system 1.8% over lidocaine patch 5%. Both products were well
tolerated as a single application in healthy adult human subjects.

ClinicalTrials.gov: NCT04144192, NCT04149938.

Read the full paper here https://www.dovepress.com/a-randomize...