- Subjects who use concurrent topical or systemic medications that may impair healing, including but not limited to: antimetabolites, isotretinoin (Accutane®) within 6 months of treatment, and amiodarone hydrochloride (Cordarone®) within 12 months of treatment; NOTE: The use of topical or systemic corticosteroids, whether chronic or acute, is deemed to adversely affect healing and subjects using such medication are specifically excluded from eligibility.