Why does this page start at 765 g?

NADAC prices this product per GM. The FDA NDC Directory’s package description gives 765 g in one package for this product’s NDC (“765 g in 1 CAN (51672-2104-3)”), so the card starts at one package: 765 GM. Change it to match your prescription.

INSTALAX POWDER

For 765 g

Pharmacies pay

$10.88 filed

765 × $0.01422 per GM

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

$17.51 estimated

$10.88 + $1.63 (15%) + $5.00 fee per fill = $17.51

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

INSTALAX POWDER is how the CMS NADAC file names this product. The FDA NDC Directory lists it as instalax polyethylene glycol 3350, under the trade name “Polyethylene Glycol 3350”.

FDA gives its dosage form as powder, for solution and its route as oral.

The labeler, the company named on the label, is Sun Pharmaceutical Industries, Inc.

FDA’s Established Pharmacologic Class for it is Osmotic Laxative.

The NADAC file of 2026-10-14 prices it under one NDC (National Drug Code), 51672-2104-03.

NADAC classes it as a generic drug (rate-setting class G), and marks it as sold over the counter.

What pharmacies pay

Pharmacies pay $10.88 for 765 g (765 × $0.01422 per GM, 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

51672-2104-03 · Sun Pharmaceutical Industries, Inc. · $0.01422 per GM · eff. 2026-09-23 filed

Compared with its class

Its NADAC price is $0.01422 per GM filed.

Of the 12 other products in FDA’s Osmotic Laxative class priced per GM, 8 have a higher middle NADAC price and 4 a lower one. The one in the middle is GAVILAX POWDER, at $0.02037 per GM 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

How the class comparison works

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 765 g? Is it lower than what I would pay through my insurance?
It is sold over the counter, so shelf prices vary from store to store: what does it cost per unit here?
How much is in the package I am getting? This page uses 765 g; 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 765 g?: NADAC prices this product per GM. The FDA NDC Directory’s package description gives 765 g in one package for this product’s NDC (“765 g in 1 CAN (51672-2104-3)”), so the card starts at one package: 765 GM. Change it to match your prescription.

Its pharmacologic class

Osmotic Laxative 97 products