Humatrope pen cartridges come in 6mg (18IU), 12mg (36IU) and 24mg (72IU) dosage strengths.

Norditropin FlexPro Nordiflex Pens 10mg (30IU) & 15mg (45IU) Pens

Saizen HGH is manufactured by Merck. Saizen hgh is a prescription medication for patients who meet certain medical criteria.