A Randomized, Multicenter Study of the Safety and Efficacy of Dermicol-P35 and Non-Animal-Stabilized Hyaluronic Acid Gel for the Correction of Nasolabial Folds

Non-animal-stabilized hyaluronic acid (NASHA) offers longer-lasting cosmetic improvement and reduced risk of hypersensitivity and requires less injection volume than bovine collagen-derived dermal fillers. Porcine collagen-derived Dermicol-P35 has low immunogenicity and has the potential to provide durability at least equivalent to that of NASHA.The objective was to evaluate the efficacy and safety of Dermicol-P35 and NASHA for correction of nasolabial folds (NLFs).A total of 149 subjects with moderate NLFs were randomized to receive Dermicol-P35 and NASHA on contralateral sides of the face. If needed, subjects could receive a repeat injection 2 weeks later to obtain an optimal cosmetic result (OCR).Significant (p<.001) improvement in the Modified Fitzpatrick Wrinkle Scale scores relative to screening was observed after treatment with Dermicol-P35 and NASHA. Relative to the OCR visit, mean scores increased (p<.001) over time, but there were no significant differences between treatments (+0.39 and +0.37 at 6 months; p=.626). Greater proportions of subjects experienced swelling, bruising, and pain at the NASHA site. Several subjects had more induration at the Dermicol-P35 site. There was no evidence of any adverse immunologic effect.The effectiveness of Dermicol-P35 is maintained for at least 6 months and is equivalent to NASHA for the correction of NLFs.