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Study Reveals Novo Nordisk’s Next Generation FlexPen Has A Significantly Lower Injection Force Than SoloStar And KwikPen

Novo Nordisk’s Next Generation FlexPen, a prefilled insulin delivery device has a significantly lower injection force than SoloStar and KwikPen. The study results indicated that the injection (dose) force of Next Generation FlexPen was 12–25% lower when compared to SoloStar and 35–41% lower than KwikPen. The study also revealed that in addition to the reduced injection force the product also has advantages over SoloStar and KwikPen in providing improved accuracy. This new data was published in this week in Expert Opinion Pharmacotherapy.

“Patients with diabetes generally prefer an insulin device with a lower injection force because it provides significantly less discomfort when injecting, especially for patients with impaired manual dexterity,” said Professor Andreas Pfützner, Institute for Clinical Research and Development, Mainz, Germany. “It is vitally important for the sake of compliance and individual satisfaction that patients with diabetes are comfortable with their insulin device as it is something they have to use on a daily basis.”

Next Generation FlexPen has been available in some countries from late 2008 and is continuing to be launched in countries around the world. It has built upon the high standards set by FlexPen. New features include 30% less force when injecting, colored cartridge holders, labels and packaging to aid insulin type identification for patients and an innovative simple and easy needle attachment with a ‘Just twist’ mechanism which allows the NovoTwist needle to be attached (to be launched from June 2009). This makes the device the first pen to be designed for use with a new generation of needles, which have a patented state-of-the-art attachment interface. These features provide improved convenience and ease of use for people with diabetes.

The study compared the dose forces of Next Generation FlexPen, SoloStar and KwikPen by injecting 20U of insulin using two different gauge needles (NovoFine 32G and BD Micro-fine 31G). Pens of each type were tested at injection speeds of 3.3, 5.0 and 8.3mm/sec. At all three injection speeds and with both needles, Next Generation FlexPen had a significantly lower average injection force than either SoloStar or KwikPen, whilst KwikPen had the highest mean injection force. Furthermore, the injection force with all three pens was lower when the NovoFine 32G needle was used as opposed to the BD Micro-fine 31G.