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Herbsmith Rx Wei Ling San is a classical Chinese herbal formula recommended by holistic veterinarians to support digestive health, dry dampness, and harmonize the stomach in dogs, cats, and horses. Comparable to Magnolia/Hoelen Combination, Calm the Stomach and Poria Powder, and Spleen Support Formula, it dries dampness, improves the spleen's transporting functions, promotes the movement of qi, harmonizes the stomach, and drains dampness. A combination of Ping Wei San (Calm the Stomach Powder) and the Wu Ling San (Poria Five Formula) tradition, it is well suited for pets presenting with dampness obstructing both the middle burner and the lower burner, with signs such as poor appetite, bloating, nausea, loose or watery stools, heaviness and lethargy, reduced urination, and edema arising from spleen qi deficiency with cold-damp stagnation in the stomach and intestines. 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), Fu Ling (Sclerotium Poriae Cocos), Zhu Ling (Sclerotium Polypori Umbellati), Bai Zhu (Rhizoma Atractylodis Macrocephalae), Gui Zhi (Ramulus Cinnamomi Cassiae)
Note: This formula is a combination of Ping Wei San (Calm the Stomach Powder) and the Poria/Wu Ling San tradition. The five herbs listed above represent the active ingredients as labeled.
Inactive Ingredient: Flaxseed
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Herbsmith Rx Wei Ling San is a five-herb formula (as labeled) that combines the dampness-draining and urination-promoting action of the Wu Ling San tradition with the stomach-harmonizing and qi-moving action of the Ping Wei San tradition, addressing dampness accumulation in both the middle burner and the lower burner simultaneously:
Wei Ling San contains diuretic and yang-warming herbs, including Ze Xie, Fu Ling, 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, gastrointestinal motility medications, and pets managing concurrent digestive or urinary conditions under 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, Wei Ling San is indicated for dampness obstructing both the middle burner and the lower burner, presenting as poor appetite, bloating, nausea, loose or watery stools, heaviness and lethargy, reduced urination, and mild edema arising from spleen qi deficiency with cold-damp stagnation in the stomach and intestines. Comparable to Magnolia/Hoelen Combination, Calm the Stomach and Poria Powder, and Spleen Support Formula, it addresses a broader and more complex dampness pattern than Wu Ling San alone by adding stomach-harmonizing and qi-moving action to the dampness-draining base, and is appropriate for pets whose presentations combine both digestive and fluid-accumulation signs.
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 appetite, stool consistency, bloating, and urinary output within 2 to 4 weeks of consistent use, as the formula works to restore the spleen's transforming and transporting functions while simultaneously harmonizing the stomach and draining accumulated dampness from both burners. Patterns with a more chronic or deeply established spleen deficiency and dampness 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.
Both formulas share a Wu Ling San (Poria Five Formula) base and are indicated for dampness accumulation with spleen deficiency, but Wei Ling San adds the Ping Wei San (Calm the Stomach Powder) layer, which brings stomach-harmonizing, qi-moving, and dampness-drying herbs specifically targeted at the middle burner. This makes Wei Ling San the more appropriate choice when a pet's presentation includes prominent digestive signs such as poor appetite, bloating, nausea, and loose stools alongside the fluid accumulation and reduced urination signs of the Wu Ling San pattern. Your authorizing veterinarian will determine which formula best matches your pet's full pattern diagnosis.
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