Why do the mg and IU numbers look different?
They are two ways of expressing the amount of somatropin. For recombinant HGH, 1 mg corresponds to approximately 3 IU. That makes a 10 mg pen about 30 IU total and a 15 mg pen about 45 IU total.
Novo Nordisk • Norditropin® HGH • FlexPro® and NordiFlex® names
Norditropin® HGH Pens FlexPro® / NordiFlex® pricing
Compare Norditropin 10 mg and 15 mg prefilled HGH pens and prices. FlexPro is the product name many U.S. customers recognize; NordiFlex is also used for Norditropin pen presentations. We identify the actual device supplied rather than treating the two pen designs as identical.
FDA-approved somatropin brandFlexPro® and NordiFlex® names10 mg / 15 mgPrescription required
FlexPro or NordiFlex—what is the difference?
Both names are associated with Norditropin somatropin. They do not automatically identify the same pen design, dose selector or package. Our displayed 10 mg and 15 mg pricing applies to the specifically listed NordiFlex presentations; ask for the exact product label before purchasing.
Current price reference
Norditropin® NordiFlex — price by presentation and quantity
Our listed prices are for the specifically identified 10 mg and 15 mg NordiFlex pen presentations. The listed prices do not imply that a FlexPro-branded pen will be supplied.
Norditropin NordiFlex 10 mg
Prefilled pen • approximately 30 IU total
| Quantity | Price per unit | Total price |
|---|---|---|
| 1 pen | $770 each | $770 |
| 3 pens | $740 each | $2,220 |
| 5 pens | $720 eachbest value | $3,600 |
Norditropin NordiFlex 15 mg
Prefilled pen • approximately 45 IU total
| Quantity | Price per unit | Total price |
|---|---|---|
| 1 pen | $1,140 each | $1,140 |
| 3 pens | $1,100 each | $3,300 |
| 5 pens | $1,050 eachbest value | $5,250 |
Current retail references reviewed October 5, 2026. Prices can change with inventory and market conditions. Prescription required; medication pricing is separate from any consultation, laboratory or physician fees.
10 mg / 15 mg
Same phenol amount
Same phenol amount
Quick answers
Smarter questions people ask before they choose a brand.
These are the practical details that reduce confusion before a consultation or purchase decision.
Is the 15 mg pen “stronger” than the 10 mg pen?
No. Both contain somatropin. The 15 mg pen contains more total medicine and a higher concentration per mL; it does not contain a more powerful version of HGH. The devices also use different dose increments.
Can one HGH brand feel different from another?
The active hormone can be the same while the device, concentration and inactive ingredients differ. Individual patients can have preferences or tolerability differences, but one brand is not automatically more potent because of its name or preservative.
What needles can NordiFlex use?
Novo Nordisk specifies NordiFlex for use with NovoFine® or NovoTwist® disposable needles up to 8 mm. NovoFine also includes ultra-short 32G 4 mm pen needles.
How large is Novo Nordisk as a manufacturer?
Novo Nordisk says it produces about half of the world’s insulin and has decades of experience manufacturing injectable biologic medicines and delivery devices.
Does the pen size change the prescribed dose?
No. Your prescribed dose is selected in the device. The larger presentation simply gives you more total somatropin in the pen and different dose-increment options; dose selection should follow the prescription.
Product facts
The details that actually matter when you compare HGH brands.
Active ingredient
Somatropin — recombinant human growth hormone. Norditropin is the brand; somatropin is the medicine.
Current presentations
Our current NordiFlex catalog uses 10 mg/1.5 mL and 15 mg/1.5 mL prefilled pens.
Inactive ingredients
Formulations include inactive ingredients such as histidine, mannitol, phenol and poloxamer 188. These formulation details can differ between brands even when the active hormone is somatropin.
Device & needle ecosystem
NordiFlex is designed for compatible Novo Nordisk disposable needles. NovoFine’s 32G 4 mm needle is an ultra-short option in the company’s needle portfolio.
Manufacturer scale
Novo Nordisk says it produces roughly half of the world’s insulin and has been working with growth-hormone products since the 1970s.
Sustainability note
Novo Nordisk publishes device take-back and recycling programs in several countries and company-wide plastic-reduction targets.
Product name and device references: Novo Nordisk: FlexPro® device information • Novo Nordisk: manufacturer product instructions
Know exactly what you are comparing before the medical decision.
Brand, presentation, total somatropin, device, price and formulation are commercial questions. Whether treatment is appropriate is a separate medical question.
MD
Dr. Manuel Aguirre Muñoz is available when product research becomes a medical decision.
English-speaking patient support can answer product, pricing and logistics questions. When treatment is being considered, Dr. Manuel Aguirre Muñoz can review the medical information and explain the next step.
Frequently asked questions
Frequently asked questions about Norditropin® NordiFlex.
Is Norditropin NordiFlex the same as Norditropin FlexPro?
They are names used for Norditropin somatropin prefilled pens, but the devices and instructions may differ. The same active ingredient does not mean the pens are mechanically interchangeable. Check the specific packaging and device instructions.
Does Norditropin require a prescription?
Yes. Norditropin is prescription somatropin.
Are Norditropin and HGH the same thing?
Norditropin is a brand of somatropin. Somatropin is recombinant human growth hormone.
Why are there different pen sizes if the hormone is the same?
The presentations hold different total amounts and concentrations of somatropin and use different dosing increments. They are delivery options, not different grades of HGH.
Does a larger pen give better results?
Not by itself. Clinical response depends on the prescribed dose, diagnosis, adherence and individual factors — not simply on choosing the largest pen.
Why can patients prefer one brand over another?
Device design, injection experience, dose increments, inactive ingredients, price and availability can all influence preference. A physician should handle any medical reason to change products.
Know the presentation and the price before you call.
Compare the pharmaceutical product first. If you want to go further, our English-speaking patient team can explain current availability, logistics and the medical evaluation process.
More to explore
Compare before you decide.
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