Order thiamine HCl 20 mg IM tid supply is 10 ml múltiple dose vial of vitamin B1 (thiamine HCl) 100 mg/mL. How much mL need to give?

0.2 ml

Explanation:

The only information in this question you need is the dose ordered and the fact that the bottle has at least 1 ml of 100 mg of medication. Ignore everything else in the question. You need 20 out of 100 mg. One fifth of 100 is 20 and one fifth of 1 ml is 0.2, so you need to give 0.2 ml of medication.

Or.

1000 mg            20 mg

        = 10(20) and 1000(x),      200=1000x

10 ml                  x

Now solve for x.

200/1000=x    

0.2 =x

0.2 ml

Or

100 mg          20mg

          =   1(20) and 100(x),     20=100x

1ml                     x

Now solve for x

20/100=x

0.2=x

0.2 ml

of

explanation: