Humatropen Empty Pen 12mgHumatropen Empty Pen 12mg Intended Use: The HumatroPen 12 mg is a reusable pen injector designed for self administration of human growth hormone. The pen injector is intended for use with the specified HUMATROPE 12 mg Cartridges and single use, detachable and disposable pen needles (supplied separately). Your healthcare provider will prescribe the HUMATROPE dose and Pen that is right for you or your child. Do not change your dose or use another type