Actrapid Penfill/Actrapid Flexpen: Insulin human, rDNA (produced by recombinant DNA technology in Saccharomyces cerevisiae).
1 mL contains 100 IU of insulin human.
1 cartridge and 1 pre-filled pen contains 3 mL equivalent to 300 IU.
One IU (International Unit) corresponds to 0.035 mg of anhydrous human insulin.
Excipients/Inactive Ingredients: Zinc chloride, glycerol, metacresol, sodium hydroxide/hydrochloric acid (for pH adjustment) and water for injections.