In some cases, the obstruction is congenital, meaning it's already present from birth
Data Integrity : Key Lessons from the 2025 FDA Warning Letters Data Integrity Is a Leadership Problem, Not a Regional One: Lessons from 2025 FDA Warning Letters Executive Summary This report provides an evaluation of US FDA Warning Letters issued in calendar year 2025 that cite 21 CFR 211.68(b), focusing on automated and computerized systems used to generate, process, store, and report CGMP data
Already, KFF reports that 6% of Americans are taking such medications
Longer-term data are required to validate these results
What they found: Darkening of existing nevi in 85 % of patients New nevi in 30 % Atypical features on dermatoscopy in 40 % Two cases of malignant melanoma in the followed cohort No evidence of a causal relationship, but associative correlation Why it matters: These are the most serious published safety data for Melanotan II