Humatrope 24mg - Auto-Injector Pen - Portable, convenient, compact HGH delivery pen. Humatrope 5 mg vial and 5-mL vial of Diluent for Humatrope lyophilized powder. Humatrope HumatroPen 6 mg, 12 mg, and 24 mg are injectable HGH pen devices created to mix and inject a single dose of Humatrope.