I

Iceland

India

Codeine - PO
Codeine + Paracetamol - PO
Buprenorphine                                                                                                 
Butorphanol Tartarate - IV                                                                                                                                  Dextropropoxyphene - PO
Dextropropoxyphene + Ibuprofen - PO
Dextropropoxyphene + Ibuprofen + Paracetamol - PO
Dextropropoxyphene + Paracetamol - PO
Fentanyl Citrate - IV,TD
Morphine - PO,IV
Nimesulide + Paracetamol + Dextropropoxyphene
Pentazocine - PO,IV
Pentazocine + Paracetamol
Pethidine
Sufentanil Citrate - IV
Tramadol - PO,IV
Tramadol + Paracetamol - PO

Contributors: Anonymous, Anjum Joad

Indonesia

Codeine - PO
Fentanyl - IV,TD
Morphine - PO,IV; IR,SR
Tramadol - PO; IR,SR

Contributor: Maria Witjaksono

Iran

Iraq

Ireland

Israel

Buprenorphine - PO,TD, Buccal
Codeine - PO; IR
Fentanyl - IV,TD
Hydromorphone - PO,IV; IR,SR
Mepiridine - IV
Methadone - PO
Morphine - PO,IV; IR,SR
Nefopam - PO,IR
Oxycodone - PO; IR,SR
Propoxyphene - PO; IR
Tramadol - PO,IV; IR

Contributor: Kassim Badarni

Italy