I'm usually pretty good at dosage calculations, but I need some help with these: One is: The physician orders Pronestyl at 1 mg/min. The solution available is 1 gm Pronestyl in 500 ml D5W. At what rate should the IV run if the drip factor is 60 gtts/ml? The other one is: The physician orders Heparin at 1200 units/hr. The solution available is Heparin 25,000 units in 500 ml D5W. How many ml/hr should the IV run? Thanks for any tips!