GS MUCUS ER 600 MG TABLET
FDA nonproprietary name: guaifenesin
For 30 tablets
Pharmacies pay
$8.52 filed
30 × $0.28398 per EA
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
$14.80 estimated
$8.52 + $1.28 (15%) + $5.00 fee per fill = $14.80
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
GS MUCUS ER 600 MG TABLET is how the CMS NADAC file names this product. The FDA NDC Directory lists it as guaifenesin, under the trade name “good sense mucus er”.
FDA gives its dosage form as tablet, multilayer, extended release and its route as oral.
The labeler, the company named on the label, is L. Perrigo Company.
FDA’s Established Pharmacologic Class for it is Expectorant.
The NADAC file of 2026-10-14 prices it under one NDC (National Drug Code), 00113-2023-58.
NADAC classes it as a generic drug (rate-setting class G), and marks it as sold over the counter.
What pharmacies pay
Pharmacies pay $8.52 for 30 tablets (30 × $0.28398 per EA, 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 code for it: 1, calculated from the most recently completed pharmacy survey.
What NADAC measures · Why 30 tablets · NADAC explanation codes
The NDC
- 00113-2023-58 · L. Perrigo Company · $0.28398 per EA · eff. 2026-09-23 filed
Other strengths, forms and brands
28 other products in the NADAC file share the FDA nonproprietary name guaifenesin with GS MUCUS ER 600 MG TABLET. The 23 below share a strength or dosage form with it first; search OpenBill for the rest.
| Product | Pharmacies pay per unit | Medicare per unit |
|---|---|---|
| CHEST CONGEST RLF 400 MG TAB | $0.06559 per EA filed | We don’t know yet |
| CHEST CONGESTION RELIEF SOLN | $0.01103 per ML filed | We don’t know yet |
| FT ADULT TUSSIN 200 MG/10 ML | $0.01819 to $0.02294 per ML filed | We don’t know yet |
| FT CHEST CONGEST 400 MG CAPLET | $0.06559 per EA filed | We don’t know yet |
| FT MUCUS RELIEF ER 1,200 MG TB | $0.43164 per EA filed | We don’t know yet |
| FT MUCUS RELIEF ER 600 MG TAB | $0.28398 per EA filed | We don’t know yet |
| GNP MUCUS ER 1,200 MG TABLET | $0.43164 per EA filed | We don’t know yet |
| GNP MUCUS ER 600 MG TABLET | $0.28398 per EA filed | We don’t know yet |
| GNP MUCUS RELIEF 400 MG TABLET | $0.06559 per EA filed | We don’t know yet |
| GNP TUSSIN MUCUS-CON 200 MG/10 | $0.01819 to $0.02294 per ML filed | We don’t know yet |
| GS MUCUS ER 1,200 MG TABLET | $0.43164 per EA filed | We don’t know yet |
| GS MUCUS ER 600 MG CAPLET | $0.28398 per EA filed | We don’t know yet |
| GS MUCUS ER 600 MG TABLET this page | $0.28398 per EA filed | We don’t know yet |
| GUAIFENESIN 100 MG/5 ML SOLN | $0.01103 per ML filed | We don’t know yet |
| GUAIFENESIN 200 MG TABLET | $0.03234 per EA filed | We don’t know yet |
| GUAIFENESIN 400 MG TABLET | $0.06559 per EA filed | We don’t know yet |
| GUAIFENESIN ER 1,200 MG TABLET | $0.43164 per EA filed | We don’t know yet |
| GUAIFENESIN ER 600 MG TABLET | $0.28398 per EA filed | We don’t know yet |
| MUCOLYTE 100 MG/5 ML LIQUID | $0.01103 to $0.02294 per ML filed | We don’t know yet |
| MUCOSA 400 MG TABLET | $0.06559 per EA filed | We don’t know yet |
| MUCUS RELIEF 400 MG TABLET | $0.06559 per EA filed | We don’t know yet |
| MUCUS RELIEF ER 1,200 MG TAB | $0.43164 per EA filed | We don’t know yet |
| MUCUS RELIEF ER 600 MG TABLET | $0.28398 per EA filed | We don’t know yet |
| QC MUCUS RELIEF ER 600 MG TAB | $0.28398 per EA filed | We don’t know yet |
CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. 2026-09-23 · as of 2026-10-14 · retrieved 2026-10-17
Compared with its class
Its NADAC price is $0.28398 per EA filed.
Of the 68 other products in FDA’s Expectorant class priced per EA, 26 have a higher middle NADAC price and 36 a lower one; 6 have the same. The one in the middle is QC MUCUS RLF COLD-FLU-THRT CPT, at $0.13211 per EA 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 30 tablets? 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?
- These are questions about price, not medical advice. Do not change or stop a medicine without talking to your prescriber or pharmacist.
Related pages
Its pharmacologic class
Related in the same class
- CHEST CONG RLF DM 400-20 MG TB
- CHEST CONG RLF PE 400-10 MG TB
- CHEST CONGESTION RELIEF DM SYR
- CHILD'S MULTI-SYMPTOM COLD LIQ
- CODEINE-GUAIFEN 10-100 MG/5 ML