Kan Essentials Urinary Support Formula (Pang Guang Zhu Yu Tang)

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Kan Essentials Urinary Support Formula is a classical Chinese herbal formula recommended by holistic veterinarians to dispel blood stasis in the bladder, address chronic damp heat accumulation in the bladder channel, move qi in the lower abdomen, and support healthy bladder function in dogs and cats presenting with bladder blood stasis with damp heat. Also known by its classical name Pang Guang Zhu Yu Tang (Drive Out Stasis from the Bladder Decoction), this eleven-herb formula is a Kan Essentials combination based on two classical formulas: Wu Yao Tang, which moves qi in the lower abdomen, and Shao Fu Zhu Yu Tang (Dispel Stasis in the Lower Palace), which moves blood in the lower burner. In TCVM, qi is the motive force for blood - when qi moves, blood moves; when qi stagnates, blood stagnates. Combining a qi-moving formula with a blood-moving formula creates a more potent and comprehensive lower-burner stasis-resolving strategy than either formula achieves alone, as the qi-moving herbs activate the blood-moving herbs and the blood-moving herbs remove the physical obstruction that perpetuates qi stagnation. From Wu Yao Tang, the formula borrows Wu Yao (lindera tuber) and Zhi Xiang Fu (prepared cyperus rhizome) to strongly move abdominal qi, and Dang Gui Wei (dong quai root tail) for its blood-moving function. From Shao Fu Zhu Yu Tang, the formula borrows its core blood-moving herbs: Zhi Yan Hu Suo (prepared corydalis), Chuan Xiong (sichuan lovage rhizome), Chi Shao (Chinese red peony root), Pu Huang (bulrush pollen), and Mo Yao (myrrh resin). Three additional herbs address the damp heat component of the combined pattern: Che Qian Cao (plantain herb) drains lingering damp heat from the bladder; Wang Bu Liu Xing (vaccaria seed) moves blood and drains dampness accumulations; and Shi Wei (pyrrosia leaf) supports healthy bladder function and clears damp heat. This formula is not appropriate as a standalone formula for blood stasis secondary to blood deficiency (where pairing with Liver Support Formula is recommended) or for kidney yang deficiency patterns (where Dispel Stasis in the Lower Palace is more appropriate); a TCVM veterinarian must confirm the pattern. Available in liquid extract and tablet forms. Dosing varies by species and body weight, and your authorizing veterinarian will provide specific guidance.

VETERINARY AUTHORIZATION REQUIRED: Submit Your Authorization Request or Request a TCVM Telemedicine Consultation

What It Supports

  • Lower abdominal qi moving through the Wu Yao Tang-derived herbs Wu Yao and Zhi Xiang Fu: Strongly moves stagnant qi in the lower abdomen and bladder region, restores smooth qi flow through the lower burner, and activates the blood-moving herbs in the formula through the TCVM principle that qi is the motive force for blood, so moving the qi amplifies the formula's blood-stasis-resolving strategy through Wu Yao (lindera tuber, Lindera aggregate) and Zhi Xiang Fu (prepared cyperus rhizome, Cyperus rotundus). Wu Yao's acrid and warm nature enters the urinary bladder, kidney, spleen, and lung channels to move qi and scatter cold, specifically targeting the lower abdominal and bladder qi stagnation that accompanies and perpetuates blood stasis in the bladder. Zhi Xiang Fu's acrid, slightly bitter, and neutral nature enters the liver, spleen, and triple burner channels to course the liver qi and move stagnant qi in the lower abdomen, amplifying Wu Yao's lower-burner qi-moving action and ensuring the formula's blood-moving herbs have the qi momentum they require to effectively clear the blood stasis. Both herbs support the formula's foundational qi-moving strategy; without it, the blood-moving component would be less effective. Generally well tolerated at standard doses.
  • Blood moving and blood nourishing through Dang Gui Wei from the Wu Yao Tang-derived component: Strongly moves blood in the lower burner, dispels blood stasis from the bladder, and provides the blood-moving bridge between the formula's qi-moving Wu Yao Tang component and its blood-moving Shao Fu Zhu Yu Tang component through Dang Gui Wei (dong quai root tail, Angelica sinensis). Dang Gui Wei is specifically the root tail section of Chinese angelica root, which is used for its pronounced blood-moving effect and minimal blood-tonifying effect; in contrast to Dang Gui Shen (root body, which emphasizes blood nourishment) or Quan Dang Gui (whole root, which balances both), the root tail's blood-activating action is the strongest section of the root and is used here to maximize the formula's blood stasis-resolving power in the lower burner. Coumarin and ferulic acid anticoagulant effects; monitoring warranted in animals on anticoagulant or antiplatelet medications. Contraindicated in pregnant animals.
  • Potent blood stasis resolving through Zhi Yan Hu Suo as the formula's most powerful blood mover: Moves blood, dispels blood stasis, and addresses the physical obstruction of blood stasis in the bladder channel with the formula's most potent single blood-activating herb through Zhi Yan Hu Suo (prepared corydalis yanhusuo tuber, Corydalis yanhusuo). Zhi Yan Hu Suo is prepared corydalis, known in Chinese materia medica as an especially effective blood-stasis-resolving herb with a particular affinity for the lower burner. Corydalis's dehydrocorybulbine (DHCB) and tetrahydropalmatine (THP) alkaloid content interact with dopamine receptors and CYP2D6 metabolic pathways; monitor animals on CNS-active medications, cardiac medications, antidopaminergic drugs (metoclopramide, acepromazine), and medications with narrow therapeutic windows that are hepatically metabolized via CYP2D6. Contraindicated in pregnant animals.
  • Blood activating, blood cooling, and blood protecting through Chi Shao: Moves and invigorates blood, cools blood-level heat, dispels blood stasis, and protects the blood from being over-scattered by the formula's strong blood-moving strategy through Chi Shao (Chinese red peony root, Paeonia lactiflora). Chi Shao's bitter and slightly cold nature enters the liver and spleen channels to both move the blood stasis and cool the blood-level heat that blood stasis generates when stagnating blood generates heat; its blood-cooling and blood-protecting function is a critical counterbalance to the formula's otherwise strongly warming and dispersing blood-activating herbs, ensuring the blood is moved effectively without being over-scattered. Paeoniflorin content with mild anticoagulant and antiplatelet effects; monitoring warranted in animals on anticoagulant medications.
  • Blood stasis removing and bladder function supporting through Pu Huang: Removes blood stasis from the lower burner, facilitates healthy bladder function, promotes urination, and provides the formula's most bladder-specific blood stasis-resolving action through Pu Huang (bulrush pollen, Typha angustifolia). Pu Huang's sweet and neutral nature enters the liver and pericardium channels to invigorate blood movement and remove blood stasis with a particular affinity for the lower jiao and bladder, making it an important herb for the formula's specific goal of clearing blood stasis from the bladder channel. Generally well tolerated; monitoring warranted in animals on anticoagulant medications given its blood-activating action.
  • Blood moving and qi activating through Mo Yao: Moves blood, dispels blood stasis, reduces swelling, and supports the formula's blood-moving strategy with the resin-based blood-activating action of Mo Yao (myrrh resin, Commiphora myrrha). Mo Yao's bitter and neutral nature enters the heart, liver, and spleen channels to invigorate blood circulation and dispel blood stasis through the penetrating and dispersing properties of the myrrh resin, complementing Zhi Yan Hu Suo and Chuan Xiong in the formula's core blood-activating strategy. Resin compounds with anticoagulant effects; monitoring warranted in animals on anticoagulant and antiplatelet medications. Contraindicated in pregnant animals.
  • Qi moving and blood activating through Chuan Xiong: Moves both qi and blood, dispels blood stasis, and provides the formula's dual qi-and-blood-moving action that bridges the formula's qi-moving Wu Yao Tang component with its blood-moving Shao Fu Zhu Yu Tang component through Chuan Xiong (sichuan lovage rhizome, Ligusticum chuanxiong). Chuan Xiong's acrid, warm nature enters the liver, gallbladder, and pericardium channels to move qi and invigorate blood through its pungent, dispersing quality, making it one of the primary qi-and-blood-moving herbs in the Chinese materia medica and an important bridge between the formula's two-formula structural strategy. Ligustilide and senkyunolide content; monitoring warranted in animals on anticoagulant medications and medications metabolized via CYP3A4 pathways.
  • Damp heat draining from the bladder through Che Qian Cao: Drains lingering damp heat from the bladder, promotes urination, and clears the damp heat component of the combined blood stasis with damp heat pattern through Che Qian Cao (plantain herb, Plantago asiatica). Che Qian Cao's cold nature enters the kidney, liver, lung, and small intestine channels to drain damp heat from the lower burner through the urinary route, addressing the chronic damp heat accumulation in the bladder that accompanies and contributes to the blood stasis pattern. Che Qian Cao is the whole-herb form (vs. Che Qian Zi, the seed form used in Subdue Liver Fire), used here for its damp-heat-draining function in the bladder. Mild diuretic action; monitoring warranted in animals on diuretic medications.
  • Blood moving and damp draining through Wang Bu Liu Xing: Moves blood, dispels blood stasis, drains dampness and dampness accumulations from the lower burner, and provides the formula's combined blood-moving and dampness-draining action that addresses both components of the blood stasis with damp heat pattern through Wang Bu Liu Xing (vaccaria seed, Vaccaria hispanica). Wang Bu Liu Xing's bitter and neutral nature enters the liver and stomach channels to move blood and drain dampness, supporting both the formula's blood stasis-resolving and damp heat-clearing strategies. Wang Bu Liu Xing also promotes lactation; use with caution in nursing females where the lactation-promoting action may not be desired. Monitor animals on anticoagulant medications, given its blood-activating action.
  • Bladder function supporting and damp heat clearing through Shi Wei: Supports healthy bladder function, clears damp heat from the lower burner, and promotes urination to expel damp heat through the urinary route through Shi Wei (pyrrosia leaf, Pyrrosia lingua). Shi Wei's bitter, sweet, and slightly cold nature enters the lung and urinary bladder channels to clear damp heat from the bladder and support healthy bladder function through the urine-guided heat-draining route, complementing Che Qian Cao and Wang Bu Liu Xing's damp heat-draining contributions. Generally well tolerated at standard doses.

TCVM Principles

  • Primary action - blood stasis in the bladder with chronic damp heat accumulation, through the dual-formula combined strategy of qi moving (Wu Yao, Zhi Xiang Fu from Wu Yao Tang) and blood moving (Zhi Yan Hu Suo, Chuan Xiong, Chi Shao, Pu Huang, Mo Yao, Dang Gui Wei from Shao Fu Zhu Yu Tang) paired with damp heat clearing (Che Qian Cao, Shi Wei, Wang Bu Liu Xing): Urinary Support Formula addresses the bladder blood stasis with damp heat pattern through the combined strategy of two classical formulas. Wu Yao Tang provides the lower-abdominal qi-moving foundation through Wu Yao and Zhi Xiang Fu; because qi is the motive force for blood in TCVM, this qi-moving base activates and amplifies the blood-moving strategy of the Shao Fu Zhu Yu Tang component. Shao Fu Zhu Yu Tang provides the core blood-activating and blood-stasis-resolving strategy through five potent blood movers (Zhi Yan Hu Suo, Chuan Xiong, Chi Shao, Pu Huang, Mo Yao), supported by Dang Gui Wei's blood-moving and mild blood-nourishing action. The three damp heat-clearing herbs (Che Qian Cao, Shi Wei, Wang Bu Liu Xing) address the damp heat accumulation in the bladder that both accompanies and contributes to the blood stasis pattern, ensuring both root causes are addressed simultaneously. Treatment Principles: move qi in the lower abdomen, dispel blood stasis in the bladder, drain damp heat from the bladder channel, and address bladder blood stasis with chronic damp heat.
  • Critical contraindications and pairing guidance: not for standalone use in blood stasis secondary to blood deficiency (pair with Liver Support Formula) or kidney yang deficiency (use Dispel Stasis in the Lower Palace instead); for strong combined blood stasis and damp heat patterns, pair with Four Marvels: Because Urinary Support Formula is primarily a blood-moving and stasis-resolving formula, it does not provide the blood-nourishing support required when blood stasis arises secondarily from blood deficiency rather than from primary stasis or damp heat accumulation. When blood stasis is secondary to blood deficiency, the formula's strong blood-moving herbs without blood-nourishing support could further deplete the blood; in this case, pairing it with Liver Support Formula provides the blood nourishment that allows the moving herbs to work safely. When the pattern involves kidney yang deficiency driving lower-burner blood stasis and cold accumulation, Dispel Stasis in the Lower Palace (Shao Fu Zhu Yu Tang) is more appropriate, as it incorporates warming yang herbs that address the cold root cause. For animals with particularly strong concurrent blood stasis and damp heat signs, pairing with Four Marvels (Si Miao San) enhances the damp heat-clearing component of the treatment strategy. Your authorizing veterinarian will determine which formula or formula pairing is appropriate based on complete pattern assessment.

Available Forms

  • 1 oz Liquid: Concentrated liquid extract; mix into food or administer directly.
  • 4 oz Liquid: Larger liquid supply for ongoing use.
  • 8 oz Liquid: Bulk liquid supply for extended or multi-pet use.
  • 60 Tablets - 500mg: Traditional small tablet format; can be hidden in food or a soft treat for easy administration.
  • 120 Tablets - 500mg: Mid-size tablet supply for ongoing use.
  • 300 Tablets - 500mg: Largest tablet supply for long-term management.

Ingredients

Active Ingredients: Wu Yao (Lindera aggregate, tuber), Che Qian Cao (Plantago asiatica, whole herb), Shi Wei (Pyrrosia lingua, leaf), Dang Gui Wei (Angelica sinensis, root tail), Pu Huang (Typha angustifolia, pollen), Chi Shao (Paeonia lactiflora, red root), Zhi Yan Hu Suo (Corydalis yanhusuo, prepared tuber), Chuan Xiong (Ligusticum chuanxiong, rhizome), Mo Yao (Commiphora myrrha, resin), Zhi Xiang Fu (Cyperus rotundus, prepared rhizome), Wang Bu Liu Xing (Vaccaria hispanica, seed)

Inactive ingredients vary by form; liquid extracts contain alcohol and water; tablets may contain excipients standard to tablet manufacturing.

VETERINARY AUTHORIZATION REQUIRED: Submit Your Authorization Request or Request a TCVM Telemedicine Consultation

Active Ingredient TCVM Actions

Urinary Support Formula (Pang Guang Zhu Yu Tang) combines eleven herbs in a dual-formula structure: qi-moving herbs from Wu Yao Tang (Wu Yao, Zhi Xiang Fu, and Dang Gui Wei) paired with blood-moving herbs from Shao Fu Zhu Yu Tang (Zhi Yan Hu Suo, Chuan Xiong, Chi Shao, Pu Huang, Mo Yao, and Dang Gui Wei), supplemented by three damp heat-clearing herbs (Che Qian Cao, Shi Wei, Wang Bu Liu Xing). Because qi is the motive force for blood in TCVM, the qi-moving foundation of Wu Yao Tang activates and potentiates the blood-activating strategy of Shao Fu Zhu Yu Tang:

  • Wu Yao (Lindera aggregate) - Lindera Tuber / Evergreen Lindera Root: Moves qi in the lower abdomen and bladder region; the primary lower-burner qi-moving herb in the formula. Generally well tolerated.
  • Zhi Xiang Fu (Cyperus rotundus, prepared) - Prepared Cyperus Rhizome / Prepared Nut Grass: Courses liver qi and strongly moves qi in the lower abdomen; amplifies Wu Yao's qi-moving action and activates the formula's blood-moving herbs. Generally well tolerated.
  • Dang Gui Wei (Angelica sinensis, root tail) - Dong Quai Root Tail / Chinese Angelica Tail: The root tail section specifically used for its pronounced blood-moving effect with minimal tonic effect; bridges the formula's qi-moving and blood-moving strategies. Coumarin and ferulic acid anticoagulant effects; monitoring warranted with anticoagulant and antiplatelet medications. Contraindicated in pregnant animals.
  • Zhi Yan Hu Suo (Corydalis yanhusuo, prepared) - Prepared Corydalis Tuber / Yan Hu Suo: The formula's most potent blood stasis-resolving herb with particular affinity for the lower burner. DHCB and THP alkaloid content; monitoring warranted with CNS-active medications, antidopaminergic drugs (metoclopramide, acepromazine), and CYP2D6-metabolized medications. Contraindicated in pregnant animals.
  • Chuan Xiong (Ligusticum chuanxiong) - Sichuan Lovage Rhizome / Szechuan Lovage: Moves both qi and blood simultaneously; bridges the formula's dual qi-and-blood-moving strategy. Ligustilide content; monitoring warranted with anticoagulant medications and CYP3A4-metabolized medications.
  • Chi Shao (Paeonia lactiflora, red) - Chinese Red Peony Root: Moves and cools blood; protects the blood from being over-scattered by the formula's strong moving herbs. Paeoniflorin content; monitoring warranted with anticoagulant medications.
  • Pu Huang (Typha angustifolia) - Bulrush Pollen / Cattail Pollen: Removes blood stasis and facilitates healthy bladder function with specific affinity for the lower burner. Monitoring warranted with anticoagulant medications.
  • Mo Yao (Commiphora myrrha) - Myrrh Resin: Moves blood and dispels stasis through the penetrating action of the resin. Resin anticoagulant effects; monitoring warranted with anticoagulant and antiplatelet medications. Contraindicated in pregnant animals.
  • Che Qian Cao (Plantago asiatica, whole herb) - Plantain Herb / Asian Plantain Herb: Drains lingering damp heat from the bladder and promotes urination to guide heat out through the urinary route. Mild diuretic action; monitoring warranted with diuretic medications.
  • Wang Bu Liu Xing (Vaccaria hispanica) - Vaccaria Seed / Cowherb Seed: Moves blood and drains dampness and dampness accumulations from the lower burner; addresses both the blood stasis and damp heat components. Promotes lactation; use with caution in nursing females. Monitoring warranted with anticoagulant medications.
  • Shi Wei (Pyrrosia lingua) - Pyrrosia Leaf / Stone Leaf: Supports healthy bladder function and clears damp heat from the lower burner through the urinary route. Generally well tolerated.

Potential Drug Interactions

Urinary Support Formula has a significant drug interaction profile given its concentration of potent blood-activating herbs. The formula contains multiple herbs with anticoagulant and antiplatelet properties: Dang Gui Wei (coumarin and ferulic acid), Chi Shao (paeoniflorin), Pu Huang, Mo Yao (resin anticoagulant effects), and Chuan Xiong (ligustilide), creating a substantial combined anticoagulant concern. Animals on warfarin, heparin, aspirin, clopidogrel, or other anticoagulant or antiplatelet medications require veterinary review before initiating this formula, and bleeding time monitoring may be appropriate during use. Zhi Yan Hu Suo's DHCB and THP alkaloid content warrant monitoring in animals on CNS-active medications and antidopaminergic drugs (metoclopramide, acepromazine); CYP2D6 involvement also warrants caution in animals on medications with narrow therapeutic windows metabolized via this route. Chuan Xiong's CYP3A4 interactions warrant monitoring in animals on medications metabolized through this pathway. Che Qian Cao's mild diuretic action warrants coordination with conventional diuretic management. Three herbs are contraindicated in pregnant animals (Dang Gui Wei, Zhi Yan Hu Suo, Mo Yao). This formula is not appropriate as a standalone formula for blood stasis secondary to blood deficiency or kidney yang deficiency.

Medication categories warranting extra caution: anticoagulant and antiplatelet medications (combined Dang Gui Wei, Chi Shao, Pu Huang, Mo Yao, and Chuan Xiong - significant combined concern), CNS-active and antidopaminergic medications (Zhi Yan Hu Suo alkaloids), CYP2D6 and CYP3A4-metabolized medications with narrow therapeutic windows (Zhi Yan Hu Suo and Chuan Xiong respectively), and diuretic medications (Che Qian Cao). Your authorizing veterinarian will determine appropriateness based on your pet's pattern diagnosis, current medications, urinary evaluation results, tongue quality, and pulse character.

VETERINARY AUTHORIZATION REQUIRED: Submit Your Authorization Request or Request a TCVM Telemedicine Consultation

Frequently Asked Questions

What is Urinary Support Formula used for in TCVM, and what signs confirm the pattern?

In Traditional Chinese Veterinary Medicine, Urinary Support Formula (Pang Guang Zhu Yu Tang) addresses the pattern of blood stasis in the bladder with chronic damp heat accumulation - a combined pattern that involves physical obstruction of blood flow in the bladder channel (blood stasis) alongside accumulated heat and dampness in the bladder (damp heat). Clinical signs include occasional urinary dysfunction and difficulty with normal urinary flow from blood stasis obstructing the bladder; occasional water retention from qi and fluid stagnation in the lower burner; signs of occasional urinary tract irritation from damp heat accumulation; and increased lower abdominal tension from qi stagnation. The confirming tongue and pulse signs are: a dry, pale, or lavender to purple tongue body (reflecting blood stasis and fluid insufficiency from heat) with sometimes a yellow coat (reflecting damp heat); and a tense, choppy pulse (tense reflecting qi constraint, choppy reflecting blood stasis and insufficient fluid movement). Together, these signs confirm the combined qi stagnation, blood stasis, and damp heat pattern for which this formula is designed. Your authorizing veterinarian must confirm the pattern through complete clinical and TCVM assessment before initiating this formula.

How is Urinary Support Formula administered, and what precautions apply?

Urinary Support Formula is available in concentrated liquid extract (1 oz, 4 oz, or 8 oz) and 500 mg tablets (60, 120, or 300 count). You can mix the liquid directly into food or administer it with a dropper; you can give the tablets directly or hide them in food or a soft treat for easy administration. Dosing varies by species and body weight, and your authorizing veterinarian will provide specific dosing guidance. Because this formula contains multiple herbs with combined anticoagulant effects (Dang Gui Wei, Chi Shao, Pu Huang, Mo Yao, Chuan Xiong), veterinary review of all current medications is important before use in animals on anticoagulant or antiplatelet medications. This formula is contraindicated in pregnant animals (Dang Gui Wei, Zhi Yan Hu Suo, Mo Yao) and is not appropriate as a standalone formula for blood stasis secondary to blood deficiency or kidney yang deficiency. Discuss CNS-active or antidopaminergic medications with the authorizing veterinarian, given Zhi Yan Hu Suo's alkaloid content.

How long does it take to see results with Urinary Support Formula?

Because this formula addresses a combined blood stasis and chronic damp heat pattern in the bladder, the timeline for results depends on how long the stasis and damp heat have been established. For more acute or recently developed patterns where blood stasis and damp heat have not yet become deeply chronic, you may see improvement in urinary comfort and function within 2 to 4 weeks of consistent use as qi and blood movement are restored and damp heat is cleared. For more chronic and established blood stasis patterns where the stasis has been present for months or longer, you may need more sustained use for 4 to 8 weeks or longer before meaningful improvement is seen, as chronic blood stasis is a deeper and more tenacious obstruction than acute stasis. Because this formula contains potent blood-activating herbs that are not designed for indefinite continuous use without veterinary reassessment, ongoing monitoring of the pattern's response is important. Your authorizing veterinarian will monitor tongue quality, pulse character, and clinical signs to determine when to continue, adjust, or modify the formula as the pattern resolves.

When should Urinary Support Formula be combined with other formulas?

Three key clinical scenarios recommend combining Urinary Support Formula with another formula. First, when blood stasis is secondary to blood deficiency (the blood stasis has arisen because insufficient blood volume allows blood to stagnate rather than from primary obstruction), Urinary Support Formula should be paired with Liver Support Formula to provide the blood-nourishing support that prevents the formula's strong blood-moving herbs from further depleting already-deficient blood. Second, when the pattern involves kidney yang deficiency driving lower-burner blood stasis and cold accumulation (cold limbs, pale tongue, slow-deep pulse, cold lower abdomen), Dispel Stasis in the Lower Palace (Shao Fu Zhu Yu Tang) is typically the more appropriate primary formula, as it includes warming yang herbs that address the cold root cause - your authorizing veterinarian will guide this differentiation. Third, for animals with particularly strong and concurrent signs of both blood stasis and damp heat, pairing Urinary Support Formula with Four Marvels (Si Miao San) enhances the damp heat-clearing component of the combined treatment strategy. Your authorizing veterinarian will determine the appropriate pairing based on a complete TCVM pattern assessment, including tongue, pulse, and clinical signs.

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