Equianalgesic Doses of Opioid Analgesics*,†

Drug

Parenteral (mg)

Oral (mg)

2

130

200

1.5

7.5

2

4

75

300

10

20

10

30

10

15‡

20

1

15

Pentazocine

60

180

  • < 30 OMME/day: 2:1

  • 31–99 OMME/day: 4:1

  • 100–299 OMME/day: 8:1

  • 300–499 OMME/day: 12:1

  • 500–999 OMME/day: 15:1

  • ≥ 1000 OMME/day: 20:1

† See also Kreutzwiser D, Tawfic QA and Pain Guidelines (based on Quill TE: Primer of Palliative Care, ed. 7. Chicago, Academy of Hospice and Palliative Medicine, 2019).

OMME = oral morphine milligram equivalents.

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