Guaifenesin: here's the fair price
This is what US pharmacies pay, on average, for guaifenesin. Use it to spot a fair cash price, and feel good about asking for one.
Guaifenesin 200 Mg Tablet
A fair cash price is usually this cost plus a dispensing fee. If your quote is many times higher, ask about a generic, another pharmacy, or a cash discount.
Ask for generic Guaifenesin 200 Mg Tablet. Pharmacies pay about $0.98 for 30. Ask your pharmacy for its cash price and compare it with your copay. A fair cash price is close to this cost plus a dispensing fee.
Source: CMS NADAC as of 2026-11-04. Ask your prescriber or pharmacist whether a generic is right for you.
Source: CMS NADAC weekly file as of 2026-11-04. Median across NDCs with the same description. Public domain.
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Every strength and form
| Product | Pharmacy cost | 30 count | Effective |
|---|---|---|---|
| GUAIFENESIN 100 MG/5 ML SOLNGeneric | $0.01 per mL | n/a | 10/21/2026 |
| GUAIFENESIN 200 MG TABLETGeneric | $0.03 per tablet or capsule | $0.98 | 10/21/2026 |
| GUAIFENESIN 400 MG TABLETGeneric | $0.07 per tablet or capsule | $2.08 | 10/21/2026 |
| GUAIFENESIN ER 600 MG TABLETGeneric | $0.27 per tablet or capsule | $8.22 | 10/21/2026 |
| GUAIFENESIN ER 1,200 MG TABLETGeneric | $0.42 per tablet or capsule | $12.52 | 10/21/2026 |
Source: CMS NADAC, as of 2026-11-04. National average acquisition cost, not a retail quote.
Label basics
What it is used for (FDA label)
Uses ■ helps loosen phlegm (mucus) and thin bronchial secretions to rid the bronchial passageways of bothersome mucus and make coughs more productive
Warnings (from the label)
Warnings Do not use ■ for children under 12 years of age
Source: FDA drug label via openFDA, label effective 2025-12-19. Full label on DailyMed. Excerpts are verbatim and truncated. Read the full label and ask your pharmacist.