Active substance
Naltrexone
2 products from 2 companies contain this in United States.
2 prescription onlyKit
Prescription only
NaltrexonePrescription only Amneal Pharmaceuticals NY LLC · NaltrexoneVivitrolPrescription only Alkermes, Inc. · Naltrexone
Same substance is not the same product. Strength, form, release mechanism and other ingredients all differ. Whether one can replace another is a decision for a pharmacist.