D. 30 mg – Explanation
100 mg of tramadol is equivalent to around 5 mg of intravenous morphine. So 600 mg
of tramadol would equate to 30 mg of intravenous morphine.
OPIOID EQUIVALENT DOSES
Below is an approximate guide for converting opioid analgesics
| Opioid analgesic | Route | Dose |
|---|---|---|
| Codeine | PO | 100 mg |
| Diamorphine | IM, IV, SC | 3 mg |
| Dihydrocodeine | PO | 100 mg |
| Morphine | PO | 10 mg |
| Morphine | IM, IV, SC | 5 mg |
| Oxycodone | PO | 6.6 mg |
| Tramadol | PO | 100 mg |
The following are important points of relative potency conversions which is a need to
know for the exam:
- Oral morphine has 1/2 the potency of oral oxycodone
o When converting from oral morphine to oxycodone, use 1/2 the dose
- Oral morphine has 1/2 the potency of injectable morphine
o When converting from oral morphine to injectable morphine, use 1/2 the dose
- Oral morphine has 1/3 the potency of injectable diamorphine
o When converting from oral morphine to injectable diamorphine, divide the dose
by three
