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. 2019 Dec 21;9(1):56–66. doi: 10.1093/jpids/piz085

Table 3.

Colistin and Polymyxin B Dosage Conversions

Colistimethate Sodium Colistimethate Sodium Colistin-base Activity
30 000 units 2.4 mg 1 mg
1 000 000 units 80 mg 34 mg
4 500 000 units 360 mg 150 mg
9 000 000 units 720 mg 300 mg
Polymyxin B
10 000 units 1 mg