Uricosuric agent - Revision history

Danbot: Strip excess bold

2026-03-22T09:15:51Z

Strip excess bold

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	==Emergency Medicine Clinical Pearls==		==Emergency Medicine Clinical Pearls==
	*'''Acute Gout Flares:''' Do NOT initiate uricosuric agents during an acute gout attack; mobilizing urate stores can worsen or prolong the flare.		*'''Acute Gout Flares:''' Do NOT initiate uricosuric agents during an acute gout attack; mobilizing urate stores can worsen or prolong the flare.
	*~~'''~~Complications:~~'''~~ The rapid increase in urinary uric acid can precipitate [[Nephrolithiasis]] (Uric Acid Stones). Patients must maintain high fluid intake (2-3L/day).		*Complications: The rapid increase in urinary uric acid can precipitate [[Nephrolithiasis]] (Uric Acid Stones). Patients must maintain high fluid intake (2-3L/day).
	*~~'''~~ASA Interaction:~~'''~~ Salicylates (like [[Aspirin]]) antagonize the uricosuric action of these drugs.		*ASA Interaction: Salicylates (like [[Aspirin]]) antagonize the uricosuric action of these drugs.
	*~~'''~~Biphasic Effect:~~'''~~ Sub-therapeutic doses may inhibit tubular secretion ''without'' inhibiting reabsorption, paradoxically increasing serum uric acid levels.		*Biphasic Effect: Sub-therapeutic doses may inhibit tubular secretion ''without'' inhibiting reabsorption, paradoxically increasing serum uric acid levels.

	==Pharmacology==		==Pharmacology==
	===Mechanism of Action===		===Mechanism of Action===
	*Acting primarily at the Proximal Convoluted Tubule of the kidney.		*Acting primarily at the Proximal Convoluted Tubule of the kidney.
	*Inhibits ~~'''~~URAT1~~'''~~ (Urate Transporter 1) and ~~'''~~OAT4~~'''~~ (Organic Anion Transporter 4) on the apical membrane.		*Inhibits URAT1 (Urate Transporter 1) and OAT4 (Organic Anion Transporter 4) on the apical membrane.
	*Blocks the active reabsorption of uric acid from the urine back into the blood, resulting in a net increase in uric acid excretion.		*Blocks the active reabsorption of uric acid from the urine back into the blood, resulting in a net increase in uric acid excretion.

	===Pharmacokinetics===		===Pharmacokinetics===
	*~~'''~~Absorption:~~'''~~ generally well-absorbed orally.		*Absorption: generally well-absorbed orally.
	*~~'''~~Protein Binding:~~'''~~ High (85-95%).		*Protein Binding: High (85-95%).
	*~~'''~~Metabolism:~~'''~~ Hepatic.		*Metabolism: Hepatic.
	*~~'''~~Excretion:~~'''~~ Renal/Biliary.		*Excretion: Renal/Biliary.

	==Adverse Reactions==		==Adverse Reactions==
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	==Drug Interactions==		==Drug Interactions==
	*''Note: This class (especially Probenecid) is notorious for inhibiting the renal excretion of other organic acids.''		*''Note: This class (especially Probenecid) is notorious for inhibiting the renal excretion of other organic acids.''
	*~~'''~~Increased Toxicity Risk:~~'''~~		*Increased Toxicity Risk:
	**[[Methotrexate]] (can be fatal)		**[[Methotrexate]] (can be fatal)
	**[[Ketorolac]] and other NSAIDs		**[[Ketorolac]] and other NSAIDs
	**[[Penicillin]] / [[Cephalosporins]] (often used therapeutically to boost levels, but can lead to toxicity if unplanned)		**[[Penicillin]] / [[Cephalosporins]] (often used therapeutically to boost levels, but can lead to toxicity if unplanned)
	**Sulfonylureas (Risk of [[Hypoglycemia]])		**Sulfonylureas (Risk of [[Hypoglycemia]])
	*~~'''~~Decreased Efficacy:~~'''~~		*Decreased Efficacy:
	**Salicylates (Aspirin) > 325mg/day block the uricosuric effect.		**Salicylates (Aspirin) > 325mg/day block the uricosuric effect.

Danbot: Danbot moved page Uricosuric Agent to Uricosuric agent without leaving a redirect: Naming convention: first word capitalized, subsequent words lowercase

2026-03-22T05:36:04Z

Danbot moved page Uricosuric Agent to Uricosuric agent without leaving a redirect: Naming convention: first word capitalized, subsequent words lowercase

← Older revision	Revision as of 05:36, 22 March 2026
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2026-01-28T00:57:07Z

Absolute

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	==Contraindications==		==Contraindications==
	===Absolute===		===Absolute===
	*History of Uric Acid [[Kidney ~~Stones~~]]		*History of Uric Acid [[Kidney Stone]]
	*Hypersensitivity to the specific agent		*Hypersensitivity to the specific agent
	*Children < 2 years (specifically [[Probenecid]])		*Children < 2 years (specifically [[Probenecid]])

Ostermayer at 18:30, 27 January 2026

2026-01-27T18:30:48Z

← Older revision		Revision as of 18:30, 27 January 2026
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	==General==		==General==
	*Type: [[Is DrugClass::Uricosuric Agent]]
	*Indications: Chronic [[Gout]] (prevention), Hyperuricemia, Adjunct to antibiotic therapy (specific agents only)		*Indications: Chronic [[Gout]] (prevention), Hyperuricemia, Adjunct to antibiotic therapy (specific agents only)
	*Mechanism: Increases renal excretion of uric acid		*Mechanism: Increases renal excretion of uric acid
	*Common Agents:		*Common Agents:
	**[[~~Probenecid~~]] ~~(Prototype)~~		{{#ask:[[Is DrugClass::Uricosuric Agent]] \|format=ul }}
	**[[Sulfinpyrazone]]
	**[[Benzbromarone]] (Not available in all regions)
	*Secondary Agents (Off-label/Minor effect):		*Secondary Agents (Off-label/Minor effect):
	**[[Losartan]]		**[[Losartan]]

Ostermayer: /* Mechanism of Action */

2026-01-27T18:25:35Z

Mechanism of Action

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	==Pharmacology==		==Pharmacology==
	===Mechanism of Action===		===Mechanism of Action===
	*Acting primarily at the [[Proximal Convoluted Tubule~~]] (PCT)~~ of the kidney.		*Acting primarily at the Proximal Convoluted Tubule of the kidney.
	*Inhibits '''URAT1''' (Urate Transporter 1) and '''OAT4''' (Organic Anion Transporter 4) on the apical membrane.		*Inhibits '''URAT1''' (Urate Transporter 1) and '''OAT4''' (Organic Anion Transporter 4) on the apical membrane.
	*Blocks the active reabsorption of uric acid from the urine back into the blood, resulting in a net increase in uric acid excretion.		*Blocks the active reabsorption of uric acid from the urine back into the blood, resulting in a net increase in uric acid excretion.

Ostermayer at 18:24, 27 January 2026

2026-01-27T18:24:57Z

← Older revision		Revision as of 18:24, 27 January 2026
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	[[~~Has type~~::~~Page~~]]		==General==
			*Type: [[Is DrugClass::Uricosuric Agent]]
			*Indications: Chronic [[Gout]] (prevention), Hyperuricemia, Adjunct to antibiotic therapy (specific agents only)
			*Mechanism: Increases renal excretion of uric acid
			*Common Agents:
			**[[Probenecid]] (Prototype)
			**[[Sulfinpyrazone]]
			**[[Benzbromarone]] (Not available in all regions)
			*Secondary Agents (Off-label/Minor effect):
			**[[Losartan]]
			**[[Fenofibrate]]
			**[[Atorvastatin]]

			==Emergency Medicine Clinical Pearls==
			*'''Acute Gout Flares:''' Do NOT initiate uricosuric agents during an acute gout attack; mobilizing urate stores can worsen or prolong the flare.
			*'''Complications:''' The rapid increase in urinary uric acid can precipitate [[Nephrolithiasis]] (Uric Acid Stones). Patients must maintain high fluid intake (2-3L/day).
			*'''ASA Interaction:''' Salicylates (like [[Aspirin]]) antagonize the uricosuric action of these drugs.
			*'''Biphasic Effect:''' Sub-therapeutic doses may inhibit tubular secretion ''without'' inhibiting reabsorption, paradoxically increasing serum uric acid levels.

			==Pharmacology==
			===Mechanism of Action===
			*Acting primarily at the [[Proximal Convoluted Tubule]] (PCT) of the kidney.
			*Inhibits '''URAT1''' (Urate Transporter 1) and '''OAT4''' (Organic Anion Transporter 4) on the apical membrane.
			*Blocks the active reabsorption of uric acid from the urine back into the blood, resulting in a net increase in uric acid excretion.

			===Pharmacokinetics===
			*'''Absorption:''' generally well-absorbed orally.
			*'''Protein Binding:''' High (85-95%).
			*'''Metabolism:''' Hepatic.
			*'''Excretion:''' Renal/Biliary.

			==Adverse Reactions==
			===Acute===
			*[[Nausea and Vomiting]] (GI intolerance is common)
			*[[Rash]] / Hypersensitivity
			*[[Nephrolithiasis]] (Renal Colic) due to uricosuria
			*Paradoxical precipitation of acute [[Gout]] arthritis

			===Serious===
			*[[Nephrotic Syndrome]]
			*Hepatic Necrosis (rare, associated with Benzbromarone)
			*Bone Marrow Suppression / Aplastic Anemia
			*Hemolytic [[Anemia]] (in patients with [[G6PD Deficiency]])

			==Contraindications==
			===Absolute===
			*History of Uric Acid [[Kidney Stones]]
			*Hypersensitivity to the specific agent
			*Children < 2 years (specifically [[Probenecid]])
			*High-grade renal insufficiency (CrCl < 30 mL/min) – drugs rely on renal flow to work effectively

			===Relative===
			*Acute [[Gout]] Attack (wait until attack resolves before initiating)
			*Peptic Ulcer Disease (specifically Sulfinpyrazone)
			*Concomitant use with drugs dependent on renal excretion (see Interactions)

			==Drug Interactions==
			*''Note: This class (especially Probenecid) is notorious for inhibiting the renal excretion of other organic acids.''
			*'''Increased Toxicity Risk:'''
			**[[Methotrexate]] (can be fatal)
			**[[Ketorolac]] and other NSAIDs
			**[[Penicillin]] / [[Cephalosporins]] (often used therapeutically to boost levels, but can lead to toxicity if unplanned)
			**Sulfonylureas (Risk of [[Hypoglycemia]])
			*'''Decreased Efficacy:'''
			**Salicylates (Aspirin) > 325mg/day block the uricosuric effect.

			==See Also==
			*[[Gout]]
			*[[Probenecid]]
			*[[Nephrolithiasis]]
			*[[Hyperuricemia]]
			*[[Allopurinol]] (Xanthine Oxidase Inhibitor - distinct class)

			==References==
			<references/>

			[[Category:Pharmacology]] [[Category:Rheumatology]] [[Category:Renal]]

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