Drug dosages Intravenous

Bolus

Infusion

Morphine

0.1-0.2mg/kg

0.05-0.07mg/kg/h

Diamorphine

0.05-0.1mg/kg

0.03-0.06mg/kg/h

Pethidine

0.5mg/kg

0.1-0.3mg/kg/h

Fentanyl

5-7.5|jg/kg

5-20jg/kg/h

Alfentanil

15-30|jg/kg

20-120jg/kg/h

Remifentanil

1jg/kg

0.05-2jg/kg/min

Other routes

Morphine

10mg IM/SC 4-hrly

5-20mg PO 4-hrly

Codeine

30-60mg IM 4-hrly

30-60mg PO 4-hrly

Diamorphine

5mg IM/SC 4-hrly

5-10mg PO 4-hrly

Dihydrocodeine

50mg IM/SC 4-6-hrly

30mg PO 4-6-hrly

Pethidine

25-100mg IM/SC 4-hrly

50-150mg PO 4-hrly

Note that the above doses are a guide only and may need to be altered widely according to individual circumstances. The correct dose of an opiate analgesic is generally enough to ablate pain.

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