I have some 3ml syringes with 23Gx1" needles. But there is also a second scale on the syringe that is marked as "M" and 40M is right at around the 2.5 ml measure. What is this M scale mean? I thought it might be IU but the numbers wouldn't be right.

  • Could you possibly get a picture? I think that would be helpful here. – michaelpri Mar 29 '16 at 0:04

Minim (unit): Part of the Apothecary system. It is rarely used anymore(some countries and areas still use the apothecary system) and is a alternative to the drop(which was formerly the smallest unit of the apothecary system).

The minim (abbreviated min, ♏ or Mx, a symbol for minim in the apothecaries' system.svg) is a unit of volume in both the imperial and US customary systems of measurement. Specifically it is 1⁄60 of a fluidram1 or 1⁄480 of a fluid ounce.

40 minim are equal to 2.48 ml. Varying slightly on what kind of calculator you use.

Henke's Med-Math: Dosage Calculation, Preparation and Administration

Since its a Injection you would round the number to the nearest 10th, so 2.46 or 2.48 would become 2.5ml's.

Minim: medical-dictionary.thefreedictionary.com

There appear to be a few types of the minim. For this, I only chose the calculation for the mimim that plainly said Minim, there appear to be a imperial and US or UK version of the Minim.

Picture courtesy of cwladis.com

enter image description here

  • The calculations make sense, this must be it - thank you – Unknown Coder Mar 29 '16 at 1:51

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