Hello! So I am doing a dosage calculation worksheet for class and I just want to double check my answer. A classmate of mine said that because penicillin injections can be very painful to use more solution. However, I've read here and elsewhere to use as little as possible. His drug book said to use less than 100,000 units per mL which I'm not so sure about. Anyway... 1.Order: penicillin G potassium 600,000 units IM. The medication label reads: ONE MILLION UNITS Penicillin G Potassium Use sterile saline as diluent as follows: Add Units per mL reconstituted solution 18.2 mL 250,000 units 8.2 mL 500,000 units 3.2 mL 1,000,000 units I would think adding 3.2mL would be the most appropriate, you'd only have to give 0.6mL. Thoughts anyone? Thanks much in advance!