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Examples of drugs with a high, intermediate and low extraction ratio (ER)
| High ER (<0.7) | Morphine |
| Fentanyl | |
| Propofol | |
| Ketamine | |
| Lidocaine | |
| Dexmedetomidine | |
| Intermediate ER (0.3–0.7) | Aspirin |
| Midazolam | |
| Alfentanil | |
| Vecuronium | |
| Low ER (<0.3) | Anti-epileptic agents: carbamazepine, phenytoin, valproic acid, phenobarbital |
| Diazepam | |
| Lorazepam | |
| Rocuronium | |
| Clonidine | |
| Thiopental | |
| Theophylline |
