IMITREX 4 MG/0.5 ML PEN INJECT
FDA nonproprietary name: sumatriptan
For 1 mL
Pharmacies pay
$463.07 filed
1 × $463.07333 per ML
CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. 2026-09-23 · as of 2026-10-14 · retrieved 2026-10-17
Medicare
We don’t know yet
No Medicare reference price. Part D: OpenBill did not match this NDC to a usable Medicare Part D spending row. Either Part D has none for it, or the rows that share its name could not safely be tied to it (for example, they mix units, routes or release forms, or the drug is sold over the counter, which Part D does not cover). Part B: This NDC is not in the current quarter’s Medicare Part B NDC-HCPCS crosswalk, so it has no Part B payment limit.
The spread
We don’t know yet
There is no Medicare figure to compare with, so there is no spread.
Cost-plus estimate
$537.53 estimated
$463.07 + $69.46 (15%) + $5.00 fee per fill = $537.53
This is a model, not a price any pharmacy quoted. Shipping is not included. How it is worked out
OpenBill calculation · nadac-national-average-drug-acquisition-cost-20261014.csv · NADAC eff. 2026-09-23 (file of 2026-10-14, retrieved 2026-10-17)
Open the interactive card Change the quantity, type what you were charged, and see every record in full.
What it is
IMITREX 4 MG/0.5 ML PEN INJECT is how the CMS NADAC file names this product. The FDA NDC Directory lists it as sumatriptan, under the trade name “IMITREX”.
FDA gives its dosage form as injection and its route as subcutaneous.
The labeler, the company named on the label, is GlaxoSmithKline LLC.
FDA’s Established Pharmacologic Class for it is Serotonin-1b and Serotonin-1d Receptor Agonist.
The NADAC file of 2026-10-14 prices it under one NDC (National Drug Code), 00173-0739-00.
NADAC classes it as a brand-name drug (rate-setting class B), and does not mark it as sold over the counter.
What pharmacies pay
Pharmacies pay $463.07 for 1 mL (1 × $463.07333 per ML, rounded to the cent), by the CMS NADAC file of 2026-10-14; that price took effect on 2026-09-23. That is what pharmacies pay their suppliers, not what they charge you.
NADAC’s explanation codes for it: 1, calculated from the most recently completed pharmacy survey; 5, calculated based on package size.
What NADAC measures · NADAC explanation codes
The NDC
- 00173-0739-00 · GlaxoSmithKline LLC · $463.07333 per ML · eff. 2026-09-23 filed
Other strengths, forms and brands
11 other products in the NADAC file share the FDA nonproprietary name sumatriptan with IMITREX 4 MG/0.5 ML PEN INJECT.
| Product | Pharmacies pay per unit | Medicare per unit |
|---|---|---|
| IMITREX 4 MG/0.5 ML PEN INJECT this page | $463.07333 per ML filed | We don’t know yet |
| IMITREX 6 MG/0.5 ML CARTRIDGES | $436.79714 per ML filed | We don’t know yet |
| IMITREX 6 MG/0.5 ML PEN INJECT | $460.05429 per ML filed | We don’t know yet |
| IMITREX 100 MG TABLET | $72.39673 per EA filed | We don’t know yet |
| SUMATRIPTAN 5 MG NASAL SPRAY | $17.03859 per EA filed | $21.97218 per EA filed |
| SUMATRIPTAN 6 MG/0.5 ML AUTOINJ | $61.41234 per ML filed | We don’t know yet |
| SUMATRIPTAN 6 MG/0.5 ML VIAL | $14.93447 to $15.00 per ML filed | We don’t know yet |
| SUMATRIPTAN 20 MG NASAL SPRAY | $16.5061 per EA filed | $21.97218 per EA filed |
| SUMATRIPTAN SUCC 25 MG TABLET | $0.23942 per EA filed | We don’t know yet |
| SUMATRIPTAN SUCC 50 MG TABLET | $0.30222 per EA filed | We don’t know yet |
| SUMATRIPTAN SUCC 100 MG TABLET | $0.43878 per EA filed | We don’t know yet |
| TOSYMRA 10 MG NASAL SPRAY | $108.22118 per EA filed | $107.19459 per EA filed |
Part D is one average per brand and generic name, over every strength and form.
CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. between 2026-07-22 and 2026-09-30 (4 dates) · as of 2026-10-14 · retrieved 2026-10-17
Medicare Part D · DSD_PTD_RY26_P04_V10_DY24_BGM.csv · eff. 2024-01-01 to 2024-12-31 · as of 2026-06-25 · retrieved 2026-10-18
Compared with its class
Its NADAC price is $463.07333 per ML filed.
Of the 5 other products in FDA’s Serotonin-1b and Serotonin-1d Receptor Agonist class priced per ML, 0 have a higher middle NADAC price and 5 a lower one. The one in the middle is ZEMBRACE SYMTOUCH 3 MG/0.5 ML, at $384.08921 per ML filed (eff. 2026-09-23).
Prices are compared per unit, whatever the strength or dose, and a class is not a list of substitutes.
CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. 2026-09-23 · as of 2026-10-14 · retrieved 2026-10-17
What Medicare paid
We don’t know yet; the card above says why.
Which Medicare figure OpenBill compares · How Part D is matched · How Part B is matched
What to ask at the counter
None of these figures is your price: what you pay depends on your pharmacy, your insurance, coupons and discounts.
- What is your cash price for 1 mL? Is it lower than what I would pay through my insurance?
- How much is in the package I am getting? This page uses 1 mL; your package may hold a different amount.
- These are questions about price, not medical advice. Do not change or stop a medicine without talking to your prescriber or pharmacist.
Questions
- Why does this page start at 1 mL?
- NADAC prices this product per ML. The FDA NDC Directory’s package description gives 1 mL in one package for this product’s NDC (“2 SYRINGE in 1 PACKAGE (0173-0739-00) / .5 mL in 1 SYRINGE”), so the card starts at one package: 1 ML. Change it to match your prescription.
Related pages
Its pharmacologic class
Related in the same class
- RIZATRIPTAN 10 MG TABLET
- NARATRIPTAN HCL 1 MG TABLET
- ELETRIPTAN HBR 20 MG TABLET
- ZOLMITRIPTAN 2.5 MG TABLET
- FROVATRIPTAN SUCC 2.5 MG TAB