C

Cambodia

Cameroon

Morphine - PO
Pentazocine - IV
Pethidine - IV

Contributor: Ndikintum George

Canada

Afentanyl - IV
Buprenorphine - PO,SL
Butorphanol - Nasal
Codeine - PO,IV; IR,SR
Fentanyl - IV, TD
Hydrocodone - PO; IR
Hydromorphone - PO,IV; IR,SR
Methadone - PO
Morphine - PO,IR; IR,SR
Nalbuphine - IV
Oxycodone - PO;IR,SR
Pentazocine - PO,IV
Pethidine - PO,IV
Propoxyphene - PO
Sufentanyl - IV
Tramadol - PO; IR,SR

Contributors: Serenia Rix, Rob Fursiewicz,  Sameer Rajwani, Doreen Oneschuk 

Cape Verde

Central African Republic

Chad

Chile

China

Bucinnazine
Codeine
Fentanyl - TD
Methadone
Morphine - PO; IR,SR
Oxycodone - PO; SR
Tramadol - PO; IR,SR

Contributor: Freida Law

Colombia

Buprenorphine - TD
Codeine - PO
Fentanyl - IV,TD
Hydrocodone - PO
Hydromorphone - PO,IV
Methadone - PO
Morphine - PO,IV
Oxycodone - PO, SR
Tramadol - PO,IV

Contributor: Marta Ximena Leon

Comoros

Congo (Brazzaville)

Congo, Democratic Republic of the

Costa Rica

Côte d'Ivoire

Croatia

Buprenorphine - TD
Codiene - PO
Fentanyl - TD
Hydromprphone - PO
Methadone - PO
Morphine - PO,IV ;IR,SR
Oxycodone - PO
Tramadol - PO,IV;IR,SR

Contributor: Matija Rimac 

Cuba

Cyprus

Czech Republic