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Cough Out Guaifenesin 100 mg/5mL Liquid, 118 mL — NDC 58593-0255-04 package photo
Label image from the product's FDA listing (DailyMed) — may show a different pack size or an older label revision.

Cough Out Guaifenesin 100 mg/5mL Liquid, 118 mL — NDC 58593-255-04 (Billing 58593-0255-04)

by Efficient Laboratories Inc. · 118 mL in 1 BOTTLE

This is a package of 118 mL of Cough Out Guaifenesin 100 mg/5mL Liquid from Efficient Laboratories Inc., no longer marketed (first marketed Jul 1997), no longer in the FDA NDC Directory. It is the main listing for this product, which comes in 2 package sizes.

NDC 58593-0255-04
🏷️ FDA NDC (as labeled) 58593-255-04 billing pads the product segment with a zero
This package
Contains118 mL Pack sizes2 compare ↓
Main listing for product 58593-255 · Also comes in: 178 ml 58593-255-06
OTC Discontinued Non-controlled ⚠ Discontinued by firm ⇄ Compare with another NDC
🗂️ FDA directory synced Oct 1, 2026 · this listing last changed Jul 24, 2026 · sources: openFDA · FDA label (DailyMed) · FDA Orange & Purple Book · First Databank · CMS NADAC, ASP, Medicare & Medicaid · RxNorm
📋 All sources & update times →

This page is curated, coded, and maintained by

Compiled from public FDA, CMS, DailyMed, NADAC, and related drug data sources. Editorial policy

⚠️
Excluded from the active FDA NDC Directory. The labeler reported this product as discontinued, so it is excluded from the active NDC Directory. A label may still appear on DailyMed, but the NDC is no longer in the current FDA NDC Directory. Search the FDA NDC Directory ↗

Identity & classification

Regulatory identifiers FDA, NLM and CMS codes for this package

FDA NDC (as labeled) 58593-255-04
Product NDC 58593-255
11-digit billing NDC 58593025504
RxCUI 310604, 1099024
UNII 495W7451VQ
Application # M012
SPL Set ID fe4c3921-8d30-4cd6-ba90-9211b362a38a
Established class (EPC) Expectorant
Physiologic effect Decreased Respiratory Secretion Viscosity; Increased Respiratory Secretions
DEA schedule Non-controlled
Marketing category OTC MONOGRAPH DRUG
Marketing status Discontinued
FDA listing status Discontinued by firm
Marketing start 1997-07-01
Marketing end 2026-10-31
Route ORAL
Dosage form LIQUID
Substance GUAIFENESIN
Quick answers
  • RxCUI (RxNorm): 310604
Why two NDCs? The FDA registers this code as 58593-255-04 — a 5-3-2 layout, and that's what's printed on the package and shown on DailyMed. For insurance claims, every NDC is standardized to a uniform 11-digit 5-4-2 format by adding a zero to the product segment → 58593-0255-04. Same drug, same package — only the format differs.
Where does this data come from?
Identifiers from the FDA openFDA NDC Directory and Structured Product Labeling; RxCUI from RxNorm (NLM); GPI from Medi-Span; GCN / HIC / AHFS / legend from First Databank.

RxNorm drug class

This medicine belongs to the Expectorant class.

Pharmacologic class Expectorant
Drug family (ATC) Expectorants
Where does this data come from?
Therapeutic classes from RxNorm RxClass (U.S. National Library of Medicine) — Established Pharmacologic Class (FDA), ATC drug family (WHO) and mechanism of action, matched by this product’s RxCUI.

Clinical

📖 What it is MedlinePlus · NLM

Guaifenesin is used to relieve chest congestion. Guaifenesin may help control symptoms but does not treat the cause of symptoms or speed recovery. Guaifenesin is in a class of medications called expectorants. It works by thinning the mucus in the air passages to make it easier to cough up the mucus and clear the airways.

Read the full MedlinePlus article ↗
📗 Our plain-language guide HelloPharmacist
  • Guaifenesin doesn't suppress your cough — it actually makes it work better. It loosens and thins the mucus in your chest so your cough can move it out of your airways more effectiv...
  • What exactly does guaifenesin do — does it actually stop my cough?
  • No — extended-release tablets like 12 Hour Mucus Relief and 365 Whole Foods Market Guaifenesin must be swallowed whole. Crushing, chewing, or breaking them releases the medicine al...
  • Can I crush or split the extended-release tablet to make it easier to swallow?
📖 Read our full Guaifenesin guide →
Where does this data come from?
Plain-language summary from MedlinePlus (U.S. National Library of Medicine); supplement & herbal interactions and nutrient depletion data from the Natural Medicines database; our full guide is HelloPharmacist editorial content.

Pricing

A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.

Price systemPer mLPer package
Retail pharmacies payNADAC · weekly Not in the retail survey — common for institutional, discontinued, or low-volume packs.
Medicaid paysCMS SDUD · 12 mo No recent Medicaid claims on file for this NDC — rare and low-volume NDCs are suppressed in the public data.
Medicare drug plans payPart D · quarterly No Part D plan price is available for this NDC in our data.
ℹ️
No price is published for this exact package yet. CMS surveys NADAC per package size, so a different pack of the same drug often has one.
Try another pack size: 178 ml
Where does this data come from?
NADAC (National Average Drug Acquisition Cost) is the CMS weekly pharmacy-acquisition-cost survey — what pharmacies pay. ASP (Average Sales Price) is the CMS Medicare Part B drug-payment file, published quarterly. Medicaid pays is computed by us from CMS State Drug Utilization Data (total reimbursed ÷ units, trailing 12 months) — gross of rebates and inclusive of dispensing fees, so it reflects what Medicaid paid, not an acquisition cost. Medicare drug plans pay is the median negotiated point-of-sale unit cost across plans listing this NDC in the CMS quarterly Prescription Drug Plan pricing files, before rebates. The VA pays is the federal contract price (FSS, and the statutory Big 4 ceiling where listed) from the VA National Acquisition Center pharmaceutical price file. All are free public government data; each measures a different payer, so the figures are not directly comparable.

Packaging — all sizes for this product

Package NDCDescription Marketing startMarketing endStatus
58593-0255-04 You're viewing this Main listing 118 mL in 1 BOTTLE 1997-07-01 — Discontinued by firm
58593-0255-06 58593-255-06 178 mL in 1 BOTTLE 1997-07-01 Oct 31, 2026 Active

You're viewing the smallest of 2 pack sizes for this product.

Pack size FAQ

What quantity is in this package?
This package contains 118 mL — 118 ml in 1 bottle.
How does this package differ from NDC 58593-0255-06?
Both are Cough Out Guaifenesin 100 mg/5mL Liquid — the drug itself is identical. This page's package is the 118 mL one, while NDC 58593-0255-06 is the 178 ml package.
What NDC number is used to bill for this package of Cough Out Guaifenesin 100 mg/5mL Liquid?
Use the 11-digit billing form listed in the identifiers section of this page. Pharmacy and medical claims use the 11-digit form; the FDA label may print a shorter form of the same code.

Therapeutic equivalents

ProductLabelerPackNADAC/unitTEStatusPrice vs. this
Chest Congestion Relief 100 mg/5mL 00536-1314-85 RUGBY 473 ml $0.011 — Availability likely —
Guaifenesin 100 mg/5mL 58657-0508-16 Method 473 ml $0.011 — Availability likely —
Guaifenesin 100 mg/5mL 83720-0503-16 Oncor 473 ml $0.011 — Availability likely —
Guaifenesin 100 mg/5mL 58657-0509-16 Method 473 ml $0.013 — FDA listed —
Good Neighbor Adult Tussin Mucus and chest congestion 200 mg/10mL 46122-0785-29 AMERISOURCE 1 bottle $0.023 — Availability likely —
Tusnel EX 100 mg/5mL 54859-0507-04 Llorens 118 ml $0.023 — Availability likely —
Mucolyte 100 mg/5mL 57237-0359-12 Rising 118 ml $0.023 — Availability likely —
Tussin 200 mg/10mL 70677-1186-01 Strategic 1 bottle $0.023 — Availability likely —
Tussin Mucus and Chest Congestion Sugar Free 200 mg/10mL 82568-0012-04 AARNA 1 bottle $0.023 — Availability likely —
QCH Adult Tussin 541 200 mg/10mL 83324-0024-04 Chain 1 bottle $0.023 — Availability likely —
Mucinex Fast-Max Chest Congestion Honey and Berry Flavor 400 mg/20mL 63824-0537-66 Reckitt 180 ml $0.061 — FDA listed —
Guaifenesin 100 mg/5mL 00121-0744-04 PAI 118 ml — — FDA listed —
Guaifenesin 200 mg/10mL 00121-1488-00 PAI 10 cups — — FDA listed —
Guaifenesin 100 mg/5mL 00121-1744-00 PAI 10 cups — — FDA listed —
Guaifenesin 300 mg/15mL 00121-2232-00 PAI 10 cups — — FDA listed —
Walgreen Cherry 200 mg/10mL 00363-7043-08 WALGREEN 1 bottle — — FDA listed —
Childrens Chest Congestion Relief 100 mg/5mL 00363-7504-04 WALGREENS 1 bottle — — FDA listed —
Tusnel EX 100 mg/5mL 50090-6542-00 A-S 118 ml — — FDA listed —
CVS Adult Mucus plus Chest Congestion 200 mg/10mL 51316-0437-08 CVS 1 bottle — — FDA listed —
CVS Adult Mucus chest congestion 200 mg/10mL 51316-0743-08 CVS 1 bottle — — FDA listed —
Tussin 100 mg/5mL 53943-0507-26 Discount 237 ml — — FDA listed —
Childrens Chest Congestion Relief Grape 100 mg/5mL 53943-0511-24 Discount 118 ml — — FDA listed —
Llorens Care Tussin 100 mg/5mL 54859-0510-16 Llorens 473 ml — — FDA listed —
Guaifenesin 200 mg/10mL 55154-5780-05 Cardinal 5 cups — — FDA listed —
Guaifenesin 100 mg/5mL 55154-9450-05 Cardinal 5 cups — — FDA listed —
Geri-Tussin 200 mg/10mL 57896-0293-16 Geri-Care 473 ml — — FDA listed —
Geri-Tussin 100 mg/5mL 57896-0693-16 Geri-Care 473 ml — — FDA listed —
Cough Out 100 mg/5mLthis 58593-0255-04 Efficient 118 ml — — Discontinued —
Rompe Pecho SF 100 mg/5mL 58593-0265-04 Efficient 118 ml — — Discontinued —
Rompe Pecho EX 200 mg/10mL 58593-0829-04 Efficient 118 ml — — FDA listed —
Guaifenesin 100 mg/5mL 60687-0852-17 American 10 cups — — FDA listed —
Guaifenesin 200 mg/10mL 60687-0863-56 American 10 cups — — FDA listed —
Guaifenesin 300 mg/15mL 60687-0874-16 American 10 cups — — FDA listed —
Childrens Mucus Relief Chest Congestion 100 mg/5mL 63868-0770-04 Chain 1 bottle — — FDA listed —
SDA Laboratories Tussin 100 mg/5mL 66424-0563-16 SDA 473 ml — — FDA listed —
DRx Choice Fruit Punch 200 mg/10mL 68163-0743-04 Raritan 1 bottle — — FDA listed —
Adult Tussin 200 mg/10mL 69230-0332-23 Camber 1 bottle — — FDA listed —
Reliable-1 Tussin 100 mg/5mL 69618-0068-54 RELIABLE 118 ml — — FDA listed —
Akin 100 mg/5mL 69822-0200-02 Southern 118 ml — — FDA listed —
MAX Tussin Mucus and Chest Congestion Sugar Free 200 mg/10mL 71399-0024-04 Akron 1 bottle — — FDA listed —
MAX Tussin Mucus and Chest Congestion 200 mg/10mL 71399-0054-08 Akron 1 bottle — — FDA listed —
Guaifenesin STRAWBERRY-BANANA FLAVOR 100 mg/5mL 71800-0059-19 Innovida 119 ml — — FDA listed —
Guaifenesin 100 mg/5mL 72162-2278-02 Bryant 473 ml — — FDA listed —
Guaifed 200 mg/10mL 73564-0801-04 Aldama 118 ml — — FDA listed —
Tussin Expectorant 100 mg/5mL 76281-0507-24 AptaPharma, 118 ml — — FDA listed —
Meijer Adult Mucus Plus chest congestion 200 mg/10mL 79481-7430-08 MEIJER 1 bottle — — FDA listed —
Guaifenesin 100 mg/5mL 81033-0102-51 KESIN 50 cups — — FDA listed —
Quality Choice Adult Tussin Expectorant 200 mg/10mL 83324-0332-04 QUALITY 1 bottle — — FDA listed —
Curewell Tussin 100 mg/5mL 85111-0693-16 RMT 473 ml — — FDA listed —
About this product: other versions of the same ingredient, strength and form are listed above, least expensive first, with FDA equivalence ratings where available.
Where does this data come from?
Equivalents are other NDCs of the same ingredient, form and route from the openFDA NDC Directory, ranked least-expensive-first by NADAC. Therapeutic-equivalence (AB) ratings come from the FDA Orange Book; biologics use the FDA Purple Book for biosimilar & interchangeable status.

Availability & generic status

🏛️
1997
On the market since
Jul 1997
📍
2026
Currently FDA-listed
29 years listed
🔒
·
No generic listed yet
brand only
ℹ️No FDA-approved generic found

We did not find an FDA-approved generic match for this exact strength, form and route.

Where does this data come from?
Patents and exclusivity from the FDA Orange Book (small-molecule drugs), refreshed from public FDA data. Generic launch timing is an estimate, not a guarantee.

Inactive Ingredients / Excipients

Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.

💡 Tap an ingredient (hover on desktop) to see what it is and why it’s used.

  • UNII ZY81Z83H0X
    Aloe vera leaf is a plant extract derived from the aloe plant. It is used in medicines as a natural moisturizer and skin-soothing agent in topical formulations.
  • UNII Z0H242BBR1
    Aspartame is an artificial sweetener made from amino acids. It's added to medicines to improve taste, making bitter or unpleasant-tasting drugs easier to take.
  • UNII Y9H1V576FH
    Honey is a natural sweetener made by bees from flower nectar. In medicines, it adds sweetness to improve taste and may help soothe throat irritation in lozenges or syrups.
  • UNII L7T10EIP3A
    A cooling compound from mint plants used as a flavoring agent and to create a fresh sensation in medicines. It helps mask bitter tastes and improve how the product feels in the mouth.
  • UNII A2I8C7HI9T
    Methylparaben is a preservative derived from benzoic acid that prevents growth of bacteria, fungi, and mold in medicines. It extends the product's shelf life and maintains safety during storage.
  • UNII 1VPU26JZZ4
    Potassium sorbate is a salt derived from sorbic acid, a naturally occurring preservative. It prevents growth of mold, yeast, and some bacteria, extending the medicine's shelf life.
  • UNII 6DC9Q167V3
    Propylene glycol is a clear liquid derived from petroleum or vegetable sources. It acts as a solvent, humectant, and preservative in medicines, helping dissolve active ingredients and maintain product stability.
  • UNII Z8IX2SC1OH
    Propylparaben is a chemical preservative used to prevent bacterial and fungal growth in medicines and personal care products. It helps extend shelf life and maintain product safety during storage.
  • UNII 059QF0KO0R
    Water is a liquid solvent that dissolves and mixes ingredients together in liquid medicines, syrups, and injections. It helps distribute the active drug evenly throughout the product.

9 inactive ingredients listed in the exact product block matched to this NDC.

The official label also statesInactive Ingredients: Aloe Vera, Aspartame, Honey, Menthol, Methylparaben, Potassium Sorbate, Propylene Glycol, Propylparaben, Purified Water

Label-section wording can be broader than the structured product block and may mention additional formulation ingredients.

Where does this data come from?
Data sourced from official FDA Structured Product Labeling (SPL) via DailyMed — ingredient classCode="IACT" elements from the exact product block matched by this NDC. Label-section narrative from DailyMed / the openFDA label index is shown separately when available.

Inactive ingredient FAQ

Are inactive ingredients the same for every manufacturer?
No. Inactive ingredients can differ by manufacturer, dosage form, strength, and package / product version.
Why might an inactive ingredient be missing?
Some SPLs do not provide a complete structured inactive-ingredient list, and older or unusual labels may only include the information in narrative text.
Can inactive ingredients matter?
Yes. They can matter for allergies, intolerances, dyes, gluten / lactose concerns, preservatives, and formulation differences — but confirm with a pharmacist or the manufacturer when it’s clinically important.

Manufacturer & labeler

LabelerEfficient Laboratories Inc.
FDA applicationM012 (OTC MONOGRAPH DRUG)
Labeler code58593
First marketedJul 1997
Product typeHuman Otc Drug
Portfolio5 products on file
The labeler markets the product; the application holder owns the FDA approval. They’re often the same company but can differ (e.g. a repackager or an authorized generic). A mailing address / phone appears here when the manufacturer includes it in the product’s FDA label (not all do).
Where does this data come from?
Labeler, application holder and registered establishment from the FDA openFDA NDC Directory and Drugs@FDA; address/contact from the product’s FDA label.

FDA label — Drug Facts FDA SPL

The complete FDA label for this product — the official Drug Facts labeling, verbatim, section by section. Jump with a chip, search within the label, or expand everything.
🎯 Indications and Usage ⏱️ Dosage and Administration ⚠️ Warnings 🧪 Active Ingredient 🧪 Inactive Ingredients 🎯 Purpose 🤰 If Pregnant or Breast-Feeding 📄 Keep Out of Reach of Children 📄 Other Information 📄 Questions or Comments 📄 Package Label / Principal Display Panel
🎯 Indications and Usage 17 words ▾

Uses Helps loosen phlegm (mucus) and thin bronchial secretions to rid the bronchial passageways of bothersome mucus.

⏱️ Dosage and Administration 57 words ▾

Directions: Shake well immediately before use. Do not exceed 6 doses in any 24 hour period. Adults and Children 12 years and over - 10 ml (2 tsps) every 4 hours Children 6 to under 12 years of age - 5 ml (1 tsp) every 4 hours Children under 6 years of age - Do not use

⚠️ Warnings 76 words ▾

Warnings Do not exceed recommended dosage Ask a doctor before use if you have a cough that is accompanied by excessive phlegm (mucus) a persistent or chronic cough such as occurs with smoking, asthma, chronic bronchitis, or emphysema. Stop use and ask a doctor if cough persists for more than 1 week, tends to recur, or is accompanied by a fever, rash, or persstent headached. A persistent cough may be a sign of a serious condition.

🧪 Active Ingredient 12 words ▾

Active Ingredient: (In each teaspoonful 5 mls) Purpose Guiafenesin 100 mg (USP)............................................Expectorant

🧪 Inactive Ingredients 15 words ▾

Inactive Ingredients: Aloe Vera, Aspartame, Honey, Menthol, Methylparaben, Potassium Sorbate, Propylene Glycol, Propylparaben, Purified Water

🎯 Purpose 2 words ▾

Purpose Expectorant

🤰 If Pregnant or Breast-Feeding 10 words ▾

If pregnant or breast-feeding, ask a health professional before use.

📄 Keep Out of Reach of Children 22 words ▾

Keep Out of Reach of Children. In case of accidental overdose, get medical help or contact the Poison Control Center right away.

📄 Other Information 20 words ▾

Each 5 mls contains: sodium 5 mg, and potassium 5 mg Phenylketonurics: Contains Phenylalanine 2.5 mg per 5 ml (teaspoonful).

📄 Questions or Comments 10 words ▾

Questions or Comments? 305.805.3456 Monday-Friday 9AM to 5PM EST www.efficientlabs.com

📄 Package Label / Principal Display Panel 1 words ▾

CoughOutLabel

Source: FDA Structured Product Labeling, mirrored from DailyMed / openFDA. Prefer the government’s original formatting? View this label on DailyMed ↗

About this NDC listing & data coverage

Over-the-counter (OTC) product No longer marketed (per FDA listing data)
What data is (and isn’t) available for this NDC — tap to expand
NDC identity (package / product / labeler codes) ✓ Available
Labeler ✓ Available
Product & package description ✓ Available
Marketing category & status ✓ Available
Active ingredient / dosage form / route ✓ Available
FDA label (SPL via DailyMed) ✓ Available
Package photos ✓ Available
Inactive ingredients (structured) ✓ Available
NADAC pharmacy acquisition price (CMS) — Not published for this NDC CMS publishes NADAC only for NDCs reported in its retail-pharmacy survey.
Orange Book / therapeutic-equivalence data — Not published for this NDC Applies only to products approved under an NDA/ANDA; many listings are out of scope.
HCPCS J-code billing crosswalk — Not published for this NDC Most self-administered / retail products have no J-code — that is normal.
Medicaid utilization (CMS SDUD) — Not published for this NDC CMS reports utilization only for NDCs with Medicaid claims above its privacy threshold.
“Not published” reflects what the public FDA / CMS / NLM sources provide for this exact package code — it is a property of the data feeds, not a judgment about the product.

Questions about this listing

Is this NDC FDA-approved?
An NDC listing does not by itself establish FDA approval — the NDC Directory records that a product is listed with FDA, not that it was reviewed and approved. This listing's marketing category is "Otc Monograph Drug". Products approved under an application carry an NDA, ANDA, or BLA number.
Why is there no price listed?
The pricing shown on our NDC pages comes from CMS NADAC, a voluntary survey of retail community pharmacy invoices. CMS does not publish a NADAC for every NDC — packages outside the retail survey (institutional and hospital products, bulk packages, discontinued items, and many OTC items) may never receive one. A missing price reflects the survey's scope, not this product's actual cost, and does not mean the product is free or unavailable.
What does the discontinued status mean for this NDC?
The labeler reported a marketing end date (or the listing was delisted), so this specific package is no longer actively marketed. Remaining stock may still be dispensed for a time, and the NDC stays valid for historical records and claims — but data feeds (pricing, labeling) typically stop updating for it. Other package sizes or other manufacturers' versions of the same medication may still be marketed — see the equivalents section where available.
Is the NDC printed on the package the same as the 11-digit billing NDC?
Yes, they identify this exact package in different formats. The form printed on the packaging and shown on DailyMed is the one the FDA registered. Insurance claims use a fixed 11-digit 5-4-2 format, so the short segment is padded with a leading zero and the dashes are dropped. The Identity section at the top of this page lists each form of this code.
Does this product come in other package sizes?
Yes — the FDA directory lists 1 other package presentation of this same product, including 178 ml (58593-0255-06). Each has its own NDC and its own page — see the package list near the top of this page.
Who lists this product with the FDA?
Efficient Laboratories Inc. is the labeler of record for this NDC — the company under whose FDA-assigned code the package is listed. The labeler may be the manufacturer itself or a distributor marketing the product under its own code.
Do I need a prescription for this product?
This NDC is listed with FDA as an over-the-counter product, so it does not require a prescription. Follow the package directions, and ask your pharmacist if you are unsure whether it is right for you.
This page identifies an FDA-listed package (the NDC) and reports public regulatory and pricing data about the listing. It is reference information, not a medical recommendation — talk to your pharmacist or prescriber about your own medication.
Where does this data come from?
Listing facts (marketing category, packager status, marketing dates) from the FDA openFDA NDC Directory; label availability from DailyMed; pricing coverage from CMS NADAC; equivalence scope from the FDA Orange Book.
← 58593-0235-04 · Efficient 58593-0265-04 · Efficient →
For educational and professional reference only — not medical advice. Pricing reflects published NADAC and CMS ASP (free public data) and may differ from your acquisition cost; always verify before billing or dispensing.