Order: Pfizerpen (penicillin potassium) 200,000 units IM q6h a) Which concentration is best to administer the dose?

Explanation:

I'm only like 60% sure so you might want to double check this.

Think:

Need 400 mg

Have 100 mg per mL ( Need four times that amount )

Calculate:

Dosage on hand       Dosage desired

                             =

Amount on hand      X Amount desired

Cross multiply  100 mg  400 mg

                          1 mL X  =mL

                          100 X = 400

                          100 X  = 400

Simplify            

                          100         100

                          X 4 mL

Withdraw 4 mL of reconstituted Zithromax using 5 mL syringe

Further dilute and give IV

Since single-dose vial, discard any remaining drug

Hopefully this helps!

ay

how are you

wyd