Regulation: control status by country
Domestic control status of a substance in a country (narcotic, psychotropic, prescription-only) from official sources.
difelikefalin: status by country
- United Statesprescription only
Source: openFDA NDC · record 01a1208c-80a0-7b12-bd34-884925dee93f;count=1 · valid from 2026-10-09 · verified 2026-10-09