Probenecid
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Questions & Answers
Side Effects & Adverse Reactions
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.
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 the possible hazards.
Legal Issues
There is currently no legal information available for this drug.
FDA Safety Alerts
There are currently no FDA safety alerts available for this drug.
Manufacturer Warnings
There is currently no manufacturer warning information available for this drug.
FDA Labeling Changes
There are currently no FDA labeling changes available for this drug.
Uses
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.
History
There is currently no drug history available for this drug.
Other Information
Probenecid is a uricosuric and renal tubular transport blocking agent.
The chemical name for probenecid is 4-[(dipropylamino) sulfonyl] benzoic acid. It has the following structural formula:
Probenecid, USP is a white or nearly 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 and the following inactive ingredients: microcrystalline cellulose, sodium lauryl sulfate, sodium starch glycolate, starch (corn), povidone, colloidal silicon dioxide, magnesium stearate, polyvinyl alcohol, titanium dioxide, polyethylene glycol, talc, D&C Yellow #10 Aluminum Lake, FD&C Yellow #6 Aluminum Lake, and FD&C Blue #2 Aluminum Lake.
Sources
Probenecid Manufacturers
- American Health Packaging
![Probenecid Tablet, Film Coated [American Health Packaging]](/wp-content/themes/bootstrap/assets/img/loading2.gif)
Probenecid | Alvix Laboratories, Llc
Apply a thin film to the affected area two or three times daily or as directed by a physician.
- Lannett Company, Inc.
Probenecid | Lannett Company, Inc.
GoutTherapy 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 (½ probenecid tablet), 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: 2-14 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)1
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 G2 (given IM), or 3 g of amoxicillin2 (given orally), or 3.5 g of ampicillin2 (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.
1 Recommended by the Center 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). 2 See package circulars of manufacturers for detailed information about CONTRAINDICATIONS, WARNINGS, PRECAUTIONS, and ADVERSE REACTIONS. - Watson Laboratories, Inc.
Probenecid | Watson Laboratories, Inc.
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 2-14 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 CONTRAINDICATIONS, WARNINGS, PRECAUTIONS, and ADVERSE REACTIONS.
- Hhs/program Support Center/supply Service Center
Probenecid | Hhs/program Support Center/supply Service Center
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 2-14 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 CONTRAINDICATIONS, WARNINGS, PRECAUTIONS, and ADVERSE REACTIONS.
- Physicians Total Care, Inc.
Probenecid | Physicians Total Care, Inc.
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 2-14 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 CONTRAINDICATIONS, WARNINGS, PRECAUTIONS, and ADVERSE REACTIONS.
- Marlex Pharmaceuticals Inc
Probenecid | Marlex Pharmaceuticals Inc
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 (½ probenecid tablet), 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 mg 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 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: 2-14 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) ¹
1Recommended by the Center of 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).
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 G² (given IM), or 3 g of amoxicillin² (given orally), or 3.5 g of ampicillin² (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.
2See package circulators of manufacturers for detailed information about CONTRAINDICATIONS, WARNINGS, PRECAUTIONS, and ADVERSE REACTIONS.
- Aphena Pharma Solutions – Tennessee, Llc
Probenecid | Aphena Pharma Solutions - Tennessee, Llc
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 (½ probenecid tablet), 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 mg 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 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: 2-14 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) ¹
1Recommended by the Center of 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).
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 G² (given IM), or 3 g of amoxicillin² (given orally), or 3.5 g of ampicillin² (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.
2See package circulators of manufacturers for detailed information about CONTRAINDICATIONS, WARNINGS, PRECAUTIONS, and ADVERSE REACTIONS.
- Mylan Pharmaceuticals Inc.
Probenecid | Mylan Pharmaceuticals Inc.
GoutTherapy 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 probenecid tablet), 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) AdultsThe 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.
Children2–14 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 G1 (given IM), or 3 g of amoxicillin2 (given orally), or 3.5 g of ampicillin2 (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 Center 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).
1 See package circulars of manufacturers for detailed information about CONTRAINDICATIONS, WARNINGS, PRECAUTIONS, and ADVERSE REACTIONS. - Carilion Materials Management
Probenecid | Carilion Materials Management
GoutTherapy with probenecid should not be until an acute gouty attack has subsided. However, if an acute attack is precipitated 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. startedduring
The recommended adult dosage is 250 mg (1/2 probenecid tablet), 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) AdultsThe 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.
Children2–14 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). 122
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 Center 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).
1 See package circulars of manufacturers for detailed information about CONTRAINDICATIONS, WARNINGS, PRECAUTIONS, and ADVERSE REACTIONS.
![Probenecid Tablet, Film Coated [Lannett Company, Inc.]](http://dailymed.nlm.nih.gov/dailymed/image.cfm?setid=ab497fd8-00c3-4364-b003-b39d21fbdf38&name=probenecid-tablets-usp-2.jpg)
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