Probenecid 500 mg Tablet, 1,000-count
🆔 Identity & classification
Where does this data come from?
🏷️ RxNorm drug class
This medicine belongs to the Preparations with no effect on uric acid metabolism class.
Where does this data come from?
🏭 Manufacturer & labeler
Where does this data come from?
🩺 Clinical
Probenecid is used to treat chronic gout and gouty arthritis. It is used to prevent attacks related to gout, not treat them once they occur. It acts on the kidneys to help the body eliminate uric acid. Probenecid is also used to make certain antibiotics more effective by preventing the body from passing them in the urine. This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.
Read the full MedlinePlus article ↗- Probenecid works differently from anti-inflammatory gout drugs like colchicine. Instead of just calming a flare, it actually helps your kidneys flush out more uric acid — the subst...
- Why did my doctor prescribe probenecid for my gout? I thought gout was treated with other drugs.
- Aspirin is one you really need to avoid with probenecid — even a small dose of aspirin blocks probenecid from doing its job of lowering uric acid. Ibuprofen and similar NSAIDs are...
- Can I take aspirin or ibuprofen for pain while I'm on probenecid?
Patient education
Supplement & herbal interactions
Some supplements/herbs that may interact with Probenecid — tap one for details:
Probenecid may be associated with lower levels of 1 nutrient — worth a chat with your pharmacist, not a cause for alarm.
Where does this data come from?
Ask a licensed pharmacist directly — free, answered by our team.
💊 What it looks like
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🧪 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.
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UNII 35SW5USQ3G
A synthetic yellow dye used to color medicines. It helps make tablets, capsules, and liquids visually distinct so patients can easily identify their medication.
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UNII L06K8R7DQK
A synthetic blue dye approved by the FDA for use in medications and foods. It serves as a colorant to make pills and liquids visually distinct and easier to identify.
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UNII WZB9127XOA
A synthetic red dye used to color medications and make them easier to identify. It serves as a colorant in tablets, capsules, and liquid formulations.
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UNII 70097M6I30
Magnesium stearate is a salt made from magnesium and stearic acid, a fatty substance. It's used in tablets and capsules as a lubricant and glidant to help ingredients flow smoothly during manufacturing and prevent sticking.
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UNII 7T9FYH5QMK
A plant-derived powder that serves as a binder and filler in tablets and capsules. It helps hold ingredients together, adds bulk, and aids in smooth tablet disintegration when swallowed.
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UNII 4R4HFI6D95
Polyethylene glycol 4000 is a synthetic polymer derived from petroleum. It serves as a binder, filler, and lubricant in solid dosage forms, and helps control how quickly the medicine dissolves.
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UNII 532B59J990
Polyvinyl alcohol is a synthetic polymer made from plant-derived materials. It's used as a binder to hold ingredients together, a film-former in coatings, and a thickener in liquid formulations.
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UNII RDH86HJV5Z
Povidone K90 is a synthetic polymer made from a chemical called vinyl pyrrolidone. It acts as a binder to hold pill ingredients together and as a dispersant to help the medicine break down and dissolve properly in your body.
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UNII ETJ7Z6XBU4
Silicon dioxide is a naturally occurring mineral used as a glidant and anti-caking agent. It helps powder ingredients flow smoothly and prevents clumping during manufacturing and storage.
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UNII 368GB5141J
A detergent and foaming agent derived from coconut or palm oil. In medications, it helps break down and mix oil and water-based ingredients, aids in tablet disintegration, and improves how the drug dissolves and spreads in the mouth or digestive system.
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UNII 5856J3G2A2
A starch-based powder made from potatoes and processed with sodium. It acts as a disintegrant, helping the tablet or capsule break apart quickly in the stomach so the medicine can be absorbed.
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UNII O8232NY3SJ
A plant-based carbohydrate derived from corn kernels. It acts as a filler to add bulk, a binder to hold ingredients together, and a disintegrant to help the tablet break apart in your stomach for absorption.
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UNII 7SEV7J4R1U
A powder made from a naturally occurring mineral. In medicines, talc works as a glidant and anti-caking agent, helping tablets and capsules flow smoothly during manufacturing and preventing clumping.
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UNII 15FIX9V2JP
Titanium dioxide is a bright white mineral powder commonly used as a colorant and opacifying agent. It makes pills and tablets white or lighter in color and helps make coatings non-transparent.
14 inactive ingredients listed in the exact product block matched to this NDC.
Where does this data come from?
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?
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Can inactive ingredients matter?
💲 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 system | Per ea | Per package |
|---|---|---|
| Retail pharmacies payNADAC · weekly | $0.655 | $655.00 / 1000 tablets |
| 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 · Q2 2026 | $1.02 | $1,020.50 / 1000 tablets |
Where does this data come from?
🔁 Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Probenecid 500 mg 00527-1367-01 | Lannett | 100 tablets | $0.655 | AB | Availability likely | — |
| Probenecid 500 mg 00591-5347-01 | Actavis | 100 tablets | $0.655 | AB | Availability likely | — |
| Probenecid 500 mgthis 16571-0831-10 | Rising | 1000 tablets | $0.655 | AB | Availability likely | — |
| Probenecid 500 mg 10135-0541-01 | Marlex | 100 tablets | — | AB | FDA listed | — |
| Probenecid 500 mg 70518-4649-00 | REMEDYREPACK | 50 tablets | — | AB | FDA listed | — |
| Probenecid 500 mg 72162-2237-01 | Bryant | 100 tablets | — | AB | FDA listed | — |
| Probenecid 500 mg 72162-2386-01 | Bryant | 100 tablets | — | AB | FDA listed | — |
Where does this data come from?
⏳ Availability & generic status
This product is an FDA-approved generic. Other versions of the same drug are listed under Therapeutic equivalents, least expensive first.
Where does this data come from?
💊 Medicaid utilization by pack size
📊 Medicare Part D spend CMS · PART D · 2026 (Q1)
📦 Packaging — all sizes for this product
| Package NDC | Description | Per unit | Per pack | Marketing start | Status |
|---|---|---|---|---|---|
| 16571-0831-01 | 100 TABLET in 1 CONTAINER (16571-831-01) | $0.6550 / ea | $65.50 | 2023-11-20 | Active |
| 16571-0831-10 You're viewing this | 1000 TABLET in 1 CONTAINER (16571-831-10) | $0.6550 / ea | $654.96 | 2023-11-20 | Active |
You're viewing the largest of 2 pack sizes for this product.
This pack effectively ties for the lowest per-ea cost of the 2 priced pack sizes ($0.6550 NADAC).
This pack shows little to no recent Medicaid volume — the 100 tablets pack carries most fills. See all packs ↓
Pack size FAQ
What quantity is in NDC 16571-0831-10?
What is the difference between NDC 16571-0831-10 and NDC 16571-0831-01?
What NDC number is used to bill for this package of Probenecid 500 mg Tablet?
Prices are the latest CMS NADAC pharmacy acquisition cost per NDC; per-pack figures are per-unit × pack quantity, shown only when the pack is denominated in the same measure NADAC prices.
📄 Full prescribing information FDA SPL
🎯 Indications and Usage ▾
INDICATIONS & USAGE Probenecid tablets are indicated for the treatment of the hyperuricemia associated with gout and gouty arthritis. As an adjuvant to therapy with penicillin or with ampicillin, methicillin, oxacillin, cloxacillin, or nafcillin, for elevation and prolongation of plasma levels by whatever route the antibiotic is given.
⏱️ Dosage and Administration ▾
DOSAGE & ADMINISTRATION Gout Therapy with probenecid should not be started until an acute gouty attack has subsided. However, if an acute attack is precipitated during therapy, probenecid may be continued without changing the dosage, and full therapeutic dosage of colchicine or other appropriate therapy should be given to control the acute attack. The recommended adult dosage is 250 mg (1/2 tablet of probenecid) twice a day for one week, followed by 500 mg (1 tablet) twice a day thereafter.
Some degree of renal impairment may be present in patients with gout. A daily dosage of 1000 mg may be adequate. However, if necessary, the daily dosage may be increased by 500 mg increments every 4 weeks within tolerance (and usually not above 2000 mg per day) if symptoms of gouty arthritis are not controlled or the 24 hour uric acid excretion is not above 700 mg.
As noted, probenecid may not be effective in chronic renal insufficiency, particularly when the glomerular filtration rate is 30 mL/minute or less. Gastric intolerance may be indicative of overdosage, and may be corrected by decreasing the dosage. As uric acid tends to crystallize out of an acid urine, a liberal fluid intake is recommended, as well as sufficient sodium bicarbonate (3 to 7.5 g daily), or potassium citrate (7.5 g daily) to maintain an alkaline urine (see PRECAUTIONS ) .
Alkalization of the urine is recommended until the serum urate level returns to normal limits and tophaceous deposits disappear, i.e., during the period when urinary excretion of uric acid is at a high level. Thereafter, alkalization of the urine and the usual restriction of purine-producing foods may be somewhat relaxed. Probenecid should be continued at the dosage that will maintain normal serum urate levels.
When acute attacks have been absent for 6 months or more and serum urate levels remain within normal limits, the daily dosage may be decreased by 500 mg every 6 months. The maintenance dosage should not be reduced to the point where serum urate levels tend to rise. Probenecid and Penicillin Therapy (General) Adults The recommended dosage is 2000 mg (4 tablets of probenecid) daily in divided doses.
This dosage should be reduced in older patients in whom renal impairment may be present. Children 2 to 14 years of age Initial dose: 25 mg/kg body weight ( or 0.7 g/square meter body surface). Maintenance dose: 40 mg/kg body weight ( or 1.2 g/square meter body surface) per day, divided into 4 doses.
For children weighing more than 50 kg (110 lb) the adult dosage is recommended. Probenecid is contraindicated in children under 2 years of age. The PSP excretion test may be used to determine the effectiveness of probenecid in retarding penicillin excretion and maintaining therapeutic levels.
The renal clearance of PSP is reduced to about one-fifth the normal rate when dosage of probenecid is adequate. Penicillin Therapy (Gonorrhea)* In uncomplicated gonococcal infections in men and women (urethral, cervical, rectal), 1 g of probenecid should be given orally with 4.8 million units of aqueous procaine penicillin G** (given IM), or 3 g of amoxicillin** (given orally), or 3.5 g of ampicillin** (given orally). For further guidance, see CDC recommendations for definition of regimens of choice, alternative regimens, treatment of hypersensitive patients, and other aspects of therapy. *Recommended by the Centers for Disease Control, U.S.
Department of Health and Human Services, Public Health Service (Morbidity and Mortality Weekly Report Supplement, Volume 34, Number 4S, October 18, 1985). **See package circulars of manufacturers for detailed information about CONTRAlNDICATIONS , WARNINGS , PRECAUTIONS , and ADVERSE REACTIONS .
⛔ Contraindications ▾
CONTRAINDICATIONS Hypersensitivity to probenecid. Children under 2 years of age. Not recommended in persons with known blood dyscrasias or uric acid kidney stones. Therapy with probenecid should not be started until an acute gouty attack has subsided.
⚠️ Warnings ▾
WARNINGS Exacerbation of gout following therapy with probenecid may occur; in such cases colchicine or other appropriate therapy is advisable. Probenecid increases plasma concentrations of methotrexate in both animals and humans. In animal studies, increased methotrexate toxicity has been reported.
If probenecid is given with methotrexate, the dosage of methotrexate should be reduced and serum levels may need to be monitored. In patients on probenecid the use of salicylates in either small or large doses is contraindicated because it antagonizes the uricosuric action of probenecid. The biphasic action of salicylates in the renal tubules accounts for the so-called “paradoxical effect” of uricosuric agents.
In patients on probenecid who require a mild analgesic agent the use of acetaminophen rather than small doses of salicylates would be preferred. Rarely, severe allergic reactions and anaphylaxis have been reported with the use of probenecid. Most of these have been reported to occur within several hours after readministration following prior usage of the drug.
The appearance of hypersensitivity reactions requires cessation of therapy with probenecid. Use in Pregnancy Probenecid crosses the placental barrier and appears in cord blood. The use of any drug in women of childbearing potential requires that the anticipated benefit be weighed against possible hazards.
🤒 Adverse Reactions ▾
ADVERSE REACTIONS The following adverse reactions have been observed and within each category are listed in order of decreasing severity. Central Nervous System: headache, dizziness. Metabolic: precipitation of acute gouty arthritis.
Gastrointestinal: hepatic necrosis, vomiting, nausea, anorexia, sore gums. Genitourinary: nephrotic syndrome, uric acid stones with or without hematuria, renal colic, costovertebral pain, urinary frequency. Hypersensitivity: anaphylaxis, fever, urticaria, pruritus.
Hematologic: aplastic anemia, leukopenia, hemolytic anemia which in some patients could be related to genetic deficiency of glucose-6-phosphate dehydrogenase in red blood cells, anemia. Integumentary: dermatitis, alopecia, flushing. To report SUSPECTED ADVERSE REACTIONS, contact Rising Pharma Holdings, Inc. at 1-844-874-7464 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch .
🔄 Drug Interactions ▾
Drug Interactions When probenecid is used to elevate plasma concentrations of penicillin or other beta-lactams, or when such drugs are given to patients taking probenecid therapeutically, high plasma concentrations of the other drug may increase the incidence of adverse reactions associated with that drug. In the case of penicillin or other beta-lactams, psychic disturbances have been reported. The use of salicylates antagonizes the uricosuric action of probenecid (see WARNINGS ).
The uricosuric action of probenecid is also antagonized by pyrazinamide. Probenecid produces an insignificant increase in free sulfonamide plasma concentrations but a significant increase in total sulfonamide plasma levels. Since probenecid decreases the renal excretion of conjugated sulfonamides, plasma concentrations of the latter should be determined from time to time when a sulfonamide and probenecid are coadministered for prolonged periods.
Probenecid may prolong or enhance the action of oral sulfonylureas and thereby increase the risk of hypoglycemia. It has been reported that patients receiving probenecid require significantly less thiopental for induction of anesthesia. In addition, ketamine and thiopental anesthesia were significantly prolonged in rats receiving probenecid.
The concomitant administration of probenecid increases the mean plasma elimination half-life of a number of drugs which can lead to increased plasma concentrations. These include agents such as indomethacin, acetaminophen, naproxen, ketoprofen, meclofenamate, lorazepam, and rifampin. Although the clinical significance of this observation has not been established, a lower dosage of the drug may be required to produce a therapeutic effect, and increases in dosage of the drug in question should be made cautiously and in small increments when probenecid is being co-administered.
Although specific instances of toxicity due to this potential interaction have not been observed to date, physicians should be alert to this possibility. Probenecid given concomitantly with sulindac had only a slight effect on plasma sulfide levels, while plasma levels of sulindac and sulfone were increased. Sulindac was shown to produce a modest reduction in the uricosuric action of probenecid, which probably is not significant under most circumstances.
In animals and in humans, probenecid has been reported to increase plasma concentrations of methotrexate (see WARNINGS ). Falsely high readings for theophylline have been reported in an in vitro study, using the Schack and Waxler technique, when therapeutic concentrations of theophylline and probenecid were added to human plasma.
🧬 Clinical Pharmacology ▾
CLINICAL PHARMACOLOGY Probenecid is a uricosuric and renal tubular blocking agent. It inhibits the tubular reabsorption of urate, thus increasing the urinary excretion of uric acid and decreasing serum urate levels. Effective uricosuria reduces the miscible urate pool, retards urate deposition, and promotes resorption of urate deposits.
Probenecid inhibits the tubular secretion of penicillin and usually increases penicillin plasma levels by any route the antibiotic is given. A 2-fold to 4-fold elevation has been demonstrated for various penicillins. Probenecid has also been reported to inhibit the renal transport of many other compounds including aminohippuric acid (PAH), aminosalicylic acid (PAS), indomethacin, sodium iodomethamate and related iodinated organic acids, 17-ketosteroids, pantothenic acid, phenolsulfonphthalein (PSP), sulfonamides, and sulfonylureas.
See also Drug Interactions . Probenecid decreases both hepatic and renal excretion of sulfobromophthalein (BSP). The tubular reabsorption of phosphorus is inhibited in hypoparathyroid but not in euparathyroid individuals.
Probenecid does not influence plasma concentrations of salicylates, nor the excretion of streptomycin, chloramphenicol, chlortetracycline, oxytetracycline, or neomycin.
📦 How Supplied / Storage and Handling ▾
HOW SUPPLIED Probenecid Tablets USP, 500 mg are bisected, capsule-shaped, yellow, film-coated tablets debossed with “C84” on one side and break line on other side. They are supplied in bottles as follows: 100 count: NDC 16571-831-01 1,000 count: NDC 16571-831-10 Dispense in well-closed container with child-resistant closure. Store at 20° to 25°C (68° to 77°F); excursions permitted to 15° to 30°C (59° to 86°F) [See USP Controlled Room Temperature].
Manufactured for: Rising Pharma Holdings, Inc. East Brunswick, NJ 08816 Made in India. Neutral Code: 4323066/TS/DRUGS/2025 Revised: 01/2026 PIR83110-05
📋 Description ▾
DESCRIPTION Probenecid is a uricosuric and renal tubular transport blocking agent. Probenecid is the generic name for 4-[(dipropyl-amino)sulfonyl] benzoic acid. It has the following structural formula: C 13 H 19 NO 4 S M.W.
285.36 Probenecid USP is a white or practically white, fine, crystalline powder. Probenecid is soluble in dilute alkali, in alcohol, in chloroform, and in acetone; it is practically insoluble in water and in dilute acids. Each tablet for oral administration contains 500 mg of probenecid.
Probenecid Tablets USP 500 mg contain the following inactive ingredients: colloidal silicon dioxide, corn starch, D&C Yellow No. 10, FD&C Blue No. 2, FD&C Red No.
40, magnesium stearate, microcrystalline cellulose, polyethylene glycol, polyvinyl alcohol, povidone, sodium lauryl sulphate, sodium starch glycolate, talc and titanium dioxide. FDA approved dissolution test specifications differ from USP. probenecid-struc