If you or your child uses Norditropin for growth hormone treatment, the FlexPro pen is a multi-dose, prefilled pen that needs a new screw-on needle for every injection. Families moving from insulin pens often ask the same questions: which needles fit, how long should they be, and how many should we keep at home? This guide covers pen needles for Norditropin FlexPro, what the product labeling says about needle length, and a simple checklist so you never run short.
Which Pen Needles Fit Norditropin FlexPro?
Norditropin FlexPro is made by Novo Nordisk, and its product information says the pen is designed for use with NovoFine or NovoTwist disposable needles up to 8mm long. Novo Nordisk also lists its NovoFine family, including NovoFine Autocover, as needles that work with FlexPro, and the NovoFine Plus box lists Norditropin among its compatible devices.
In practice, that means a NovoFine needle in 4mm, 6mm, or 8mm is within what the labeling describes. Good options include:
- NovoFine Plus 32G 4mm, 100-count box: Novo Nordisk's shortest, thinnest needle, currently $76.99 (about $0.77 per needle).
- NovoFine 32G 6mm, 100-count box: a slightly longer 32G option, currently $76.99, for people who were taught to use 6mm.
Prices can change, so check each product page. Your pen's Instructions for Use and your care team are the final word on which needle to use.
What Size Pen Needle for Norditropin FlexPro?
Norditropin is injected under the skin (subcutaneously). Widely used injection technique guidance favors short needles for most children and adults, because they reach the fat layer under the skin with less chance of going into muscle.
- Length: the labeling allows needles up to 8mm. Many families start with 4mm, the shortest common pen needle length.
- Gauge: higher numbers are thinner. 32G is among the thinnest pen needles sold in the US, which many kids and needle-shy adults appreciate.
- Technique: children and very lean people may be taught to pinch up the skin. Follow what your endocrinologist or nurse showed you.
- Don't change on your own: if you were trained on a specific length, keep using it unless your care team says otherwise.
Using the FlexPro PenMate? Stick With Novo Nordisk Needles
Some families use the FlexPro PenMate, an accessory that hides the needle during the injection to ease needle worry. Novo Nordisk says PenMate is designed for use with Novo Nordisk disposable needles, so a NovoFine or NovoFine Plus needle is the natural pairing if you use it.
How Many Pen Needles Do You Need?
Use a brand-new needle for every injection, and plan around your prescribed schedule:
- One injection a day: about 30 needles a month, so one 100-count box lasts roughly three months.
- Spares: add a few extra for a dropped needle, a bent needle, or a flow check that needs repeating.
- Expiration: check the date on the box so it covers the time it will take you to use it.
Pen needles are generally an eligible FSA/HSA expense; check with your plan administrator. You can compare every brand, length, and pack size in our pen needles collection.
What About Other Growth Hormone Pens?
Not every growth hormone pen points to the same needle brand. For example, the US Omnitrope Pen 5 instructions list BD pen needles (in 5mm, 8mm, and 12.7mm sizes) and note that needles are not included with the pen. Always follow the needle guidance in your own pen's instructions, and ask your pharmacist before switching brands.
Norditropin FlexPro Pen Needle Checklist
- Peel the paper tab and screw the needle on straight until snug.
- Remove both the outer cap and the thin inner cap.
- Check the flow before the first injection with a new pen, as the instructions describe.
- Remove the needle after every injection; don't store the pen with a needle attached.
- Put the pen cap back on and store the pen as your instructions direct.
- Drop used needles in a sharps container, and never share a pen, even with a new needle.
For more on helping kids with injections, see our guide to pen needles for kids and teens.
FAQ
Do BD needles fit Norditropin FlexPro?
The FlexPro labeling names NovoFine and NovoTwist needles. Many standard screw-on needles share the same connection, but check with your pharmacist before using another brand.
Can I use a 12.7mm needle?
The FlexPro labeling describes needles up to 8mm, so longer needles are outside that guidance.
Can I reuse a needle for the next day's shot?
No. Pen needles are single-use. Reusing one can dull the tip, clog the needle, and raise infection risk.
New customers can use code WELCOME10 for 10% off their order.
This article is general information, not medical advice. Follow your healthcare provider's instructions for your medication, dose, needle size, and injection technique.
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