Published Studies Related to Probenecid
Pharmacokinetic properties and bioequivalence of two compound formulations of 1500 mg ampicillin (1167 mg)/probenecid (333 mg): a randomized-sequence, single-dose, open-label, two-period crossover study in healthy Chinese male volunteers. [2010.03]
BACKGROUND: Ampicillin/probenecid is an antimicrobial formulation indicated for the treatment of respiratory, urinary tract, and gastrointestinal infections. Ampicillin sodium is the active antimicrobial ingredient that can act on the phase of bacterial breeding and inhibit the biosynthesis of bacterial mucopeptide in the cell wall. Probenecid acts synergistically by competitively inhibiting an organic anion transporter in renal tubules, increasing the plasma concentrations, and thus extending the plasma elimination t(1/2). OBJECTIVE: The aim of this study was to assess and compare the pharmacokinetic (PK) properties, bioavailability, and bioequivalence of a newly developed dispersible tablet formulation (test) of ampicillin/ probenecid with those of an established branded capsule formulation (reference) in healthy Chinese male volunteers... CONCLUSIONS: In this small study in healthy Chinese male volunteers, a single 1500-mg dose of the dispersible tablet formulation (test) of ampicillin/probenecid met the SFDA's regulatory criteria for bioequivalence to the reference capsule formulation based on the rate and extent of absorption. Both formulations were well tolerated. Copyright 2010 Excerpta Medica Inc. All rights reserved.
Efficacy and tolerability of urate-lowering drugs in gout: a randomised controlled trial of benzbromarone versus probenecid after failure of allopurinol. [2009.01]
OBJECTIVES: To investigate the efficacy and tolerability of allopurinol as the first-choice antihyperuricaemic treatment for gout, and compare the efficacy and tolerability of benzbromarone and probenecid as second-choice treatment... CONCLUSION: This study showed that allopurinol 300 mg/day has a poor efficacy and tolerability profile when used to attain a biochemical predefined target level of sUr < or =0.30 mmol/l, following 2 months of treatment. In stage 2, benzbromarone 200 mg/day was more effective and better tolerated than probenecid 2 g/day.
Pharmacokinetics and tolerability of oseltamivir combined with probenecid. [2008.09]
Oseltamivir is an inhibitor of influenza virus neuraminidase, which is approved for use for the treatment and prophylaxis of influenza A and B virus infections.Alternate-day dosing of oseltamivir plus dosing with probenecid four times daily achieved trough oseltamivir carboxylate concentrations adequate for neuraminidase inhibition in vitro, and this combination should be studied further.
Reduction in non-glomerular renal clearance of the caffeine metabolite 1-methylxanthine by probenecid. [2007.08]
OBJECTIVE: Urinary caffeine metabolic ratios used to quantify the activity of numerous drug-metabolizing enzymes are an established component of cocktail approaches for metabolic phenotyping. Because in vitro evidence suggests that 1-methylxanthine (1-MX), a major caffeine metabolite, is actively secreted into urine by organic anion transporters (hOATs), coadministration of renal hOAT inhibitors like probenecid may impair these procedures... CONCLUSIONS: 1-MX undergoes renal tubular secretion which is substantially reduced by probenecid, possibly due to inhibition of renal hOATs. This inhibition may explain the influence of probenecid on urinary caffeine metabolic ratios and, thus, its impact on the assessment of enzyme activities. It also suggests that 1-MX might serve as a model substrate for the renal tubular transport of organic anions.
Effect of probenecid on the pharmacokinetics of carbamazepine in healthy subjects. [2005.06]
OBJECTIVES: Carbamazepine (CBZ) undergoes biotransformation by CYP3A4 and CYP2C8, and glucuronide conjugation. There has been no clear demonstration to reveal the role of glucuronidation in the disposition of CBZ. We evaluated the effect of probenecid, a UDP-glucuronosyltransferase inhibitor, on the pharmacokinetics of CBZ in humans... CONCLUSION: Although probenecid showed a minimal effect on the glucuronidation of CBZ and CBZ-E, it increased CBZ biotransformation to CBZ-E, most likely reflecting the induction of CYP3A4 and CYP2C8 activities, in humans. These results demonstrate that glucuronide conjugation plays a minor role in the metabolism of CBZ and CBZ-E in humans, and that probenecid has an inducing effect on the disposition of CBZ.
Clinical Trials Related to Probenecid
Safety and Tolerance of Zidovudine With Probenecid and the Effect of Probenecid on Zidovudine Pharmacokinetics Over Four Weeks [Completed]
To evaluate the interaction of probenecid with zidovudine (AZT). Because AZT is eliminated
quickly from the body, it must be taken frequently. A previous study showed that probenecid
slowed the elimination of AZT without side effects, but that study lasted only 5 days. This
study is to see whether this effect continues for 1 month and whether the continuation of
probenecid and AZT is free of side effects over 1 month.
Influence of Probenecid and Quinine on the Pharmacokinetics of Azidothymidine [Completed]
Part I studies the effect of quinine on how zidovudine (AZT) is used by the body and
eliminated through the kidneys in HIV infected patients. Part II studies the effect of
probenecid and quinine on the same aspects.
Because AZT leaves the bloodstream quickly, patients must take the drug frequently to keep
adequate amounts in their bodies. Probenecid and quinine may slow down the rate at which AZT
leaves the body. Therefore, taking these drugs along with AZT may reduce the amount of AZT
needed for treatment.
10-Propargyl-10-Deazaaminopterin Plus Probenecid in Treating Patients With Advanced Solid Tumors [Completed]
RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so
they stop growing or die. Probenecid may increase the effectiveness of
10-propargyl-10-deazaaminopterin by making tumor cells more sensitive to the drug.
PURPOSE: Phase I trial to study the effectiveness of combining
10-propargyl-10-deazaaminopterin and probenecid in treating patients who have advanced solid
Evaluating the Transporter Protein Inhibitor Probenecid In Patients With Epilepsy [Recruiting]
The study is being done to understand why some patients with epilepsy (disease of recurrence
of seizures) do not respond very well to drug treatment with anticonvulsants.
Despite the availability of many anticonvulsants, about 30% of patients with epilepsy are
resistant to them. The cause of the resistance is not clear, but one of the reasons could be
an increased amount of proteins in the cells of the body called transporter proteins.
Transporter proteins are a group of proteins that help to defend the body against toxins,
including drugs, by pumping them out of the cells. Studies have shown that the number of
transporter proteins is higher in the parts of the brain that trigger seizures when compared
to other parts of the brain.
Studies in animals have shown that taking an anticonvulsant with an inhibitor (meaning "to
stop" or "to reduce") of a transporter protein can increase the concentration of that
anticonvulsant inside the brain cells. The main purpose of the study is to determine if
taking an anticonvulsant and a transporter protein inhibitor will change the brain
concentration of the anticonvulsant.
In this study, a single dose of phenytoin (Dilantin® is a brand name anticonvulsant which
has phenytoin as its active ingredient), a commonly used anticonvulsant, will be given once
by itself, and then will be given a separate time with a single (i. e. one time only) dose of
probenecid. Probenecid, a medicine used commonly to treat gout (a disease of increased uric
acid), is known to be an inhibitor of transporter proteins. The study will use
electroencephalogram or EEG (recording of brain wave activities) to determine if the EEG
pattern when probenecid is given, will be different from the EEG pattern when phenytoin is
given alone. This will suggest that probenecid has affected the brain concentration of
Evaluation of Alternative Oseltamivir (Tamiflu) Dosing Strategies. [Completed]
Objective 1: Determine the safety and toxicity profile of Tamiflu administered in
combination with probenecid in healthy adults. Objective 2: Determine the pharmacokinetic
profile of Tamiflu and probenecid in healthy adults.
Reports of Suspected Probenecid Side Effects
Myelodysplastic Syndrome (4),
Therapeutic Response Decreased (4),
Blood Creatinine Increased (1),
Decreased Appetite (1),
Nausea (1), more >>