Parenteral to oral conversion ratios of common opioids
Drug |
Oral to parenteral ratio |
| Oral Morphine: Parenteral Morphine | 3:1 |
| Oral Hydromorphone : Parenteral Hydromorphone | 5:1 |
| Oral Levorphanol : Parenteral Levorphanol | 1:1 |
| Oral Methadone : Parenteral Methadone | 2:1 |
