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Herbsmith Rx Wu Ling San is a classical Chinese herbal formula recommended by holistic veterinarians to support fluid metabolism, promote urination, and drain dampness in dogs, cats, and horses. Comparable to Hoelen Five Herb Formula, Five Ingredient with Poria, Water's Way, and Poria Five Formula, it promotes urination, drains dampness, strengthens the spleen, warms the yang, and promotes the transforming functions of qi. Well suited for pets presenting with urinary difficulty or reduced urine output, water accumulation, edema, generalized dampness, thirst with urinary retention, or signs of bladder qi transformation failure arising from spleen and yang deficiency with water accumulation. Available as a concentrated powder mixed into food; cats and dogs use the Canine Blend, while horses use the Equine/Horse Blend. Dosing varies by species and body weight, and your authorizing veterinarian will provide specific guidance.
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For Dogs (Canine Blend Powder):
For Cats (Canine Blend Powder): ¼ tsp twice daily, or as prescribed
For Horses (Equine/Horse Blend, 1,000 lb horse): Two tablespoons twice daily for 20 days, then two tablespoons once daily in grain. If the horse initially refuses, start with a small amount mixed into grain and gradually increase until the horse is accustomed to the taste. Most horses will readily accept the herbs in their grain.
Active Ingredients: Ze Xie (Rhizoma Alismatis Orientalis), Zhu Ling (Sclerotium Polypori Umbellati), Bai Zhu (Rhizoma Atractylodis Macrocephalae), Gui Zhi (Ramulus Cinnamomi Cassiae)
Inactive Ingredient: Flaxseed
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Herbsmith Rx Wu Ling San is a four-herb formula (as labeled) based on the classical Wu Ling San (Five Ingredient with Poria) tradition, combining dampness-draining, spleen-strengthening, and yang-warming herbs to address the full water accumulation pattern from both the excess (dampness accumulation) and deficiency (spleen and yang deficiency) aspects:
Wu Ling San contains diuretic and yang-warming herbs, including Ze Xie, Zhu Ling, and Gui Zhi, which significantly affect fluid balance, electrolyte levels, and cardiovascular function. Pets currently on prescription diuretics, cardiac medications, or medications requiring stable fluid and electrolyte balance should use this formula under close veterinary supervision, as combining herbal and pharmaceutical diuretics can produce additive effects on fluid and electrolyte balance, and herb-drug interaction research in dogs and cats remains limited.
Medication categories warranting extra caution include diuretic medications, cardiac medications, blood pressure medications, corticosteroids, and pets managing kidney or urinary conditions under concurrent pharmaceutical protocols. Your authorizing veterinarian can determine appropriateness based on your pet's condition, current medications, and laboratory results.
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In Traditional Chinese Veterinary Medicine, Wu Ling San is indicated for water accumulation patterns presenting as urinary difficulty or reduced urine output, edema, generalized dampness, thirst with urinary retention, and signs of bladder qi transformation failure arising from spleen qi deficiency and yang deficiency with water accumulation. Comparable to Hoelen Five Herb Formula, Five Ingredient with Poria, Water's Way, and Poria Five Formula, it is one of the foundational TCVM formulas for addressing fluid metabolism disorders in dogs, cats, and horses, and is appropriate for pets whose fluid-related signs reflect an underlying deficiency in the spleen's transforming and transporting functions and the bladder's qi transformation ability.
Mix the powder directly into food or grain at the dose recommended for your pet's species and body weight. Both dogs and cats use the Canine Blend; horses use the Equine/Horse Blend. Dogs and cats receive the formula twice daily; horses receive two tablespoons twice daily for the first 20 days, then once daily for maintenance. Your authorizing veterinarian will confirm the appropriate dose and schedule and advise on any monitoring needed for fluid balance and electrolyte levels during treatment.
Many pets show improvement in urinary output, edema, and general dampness signs within 2 to 4 weeks of consistent use, as the formula works to restore the spleen's and bladder's fluid metabolism functions while simultaneously draining existing dampness accumulation. Patterns with a deeper or more chronic deficiency component, such as long-standing spleen qi deficiency or yang deficiency with significant water accumulation, may require a longer course of treatment, and your veterinarian may recommend periodic reassessment including laboratory monitoring to evaluate the formula's effectiveness and your pet's fluid and electrolyte balance.
Combination with complementary TCVM formulas is common in holistic veterinary practice and should be guided by your authorizing veterinarian based on your pet's full pattern diagnosis. Because this formula contains diuretic herbs Ze Xie and Zhu Ling alongside the yang-warming Gui Zhi, veterinary oversight is especially important if your pet is on pharmaceutical diuretics, cardiac medications, or blood pressure medications, to monitor for additive fluid and electrolyte effects and ensure the combined treatment plan is appropriate for your pet's overall health status and laboratory values.
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