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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What It Supports
- Dampness drying and stomach harmonization: Dries dampness from the middle burner and harmonizes the stomach, addressing the cold-damp obstruction of the spleen and stomach that drives poor appetite, bloating, nausea, and loose stools in pets with dampness-predominant digestive presentations.
- Spleen transporting function support: Improves the spleen's transforming and transporting functions, restoring the spleen's ability to digest food, distribute nutrients, and metabolize fluids normally, addressing the spleen qi deficiency at the root of both the dampness accumulation and the digestive irregularity.
- Qi movement promotion: Promotes the free movement of qi in the middle and lower burners, relieving the bloating, fullness, and digestive sluggishness caused by qi stagnation that develops when dampness obstructs the normal flow of qi through the spleen and stomach.
- Dampness drainage and urination promotion: Drains accumulated dampness through urination, addressing lower-burner dampness accumulation and reduced urination or mild edema that accompany the spleen's failure to transform and distribute fluids, while also addressing the middle-burner dampness component through the stomach-harmonizing herbs.
TCVM Principles
- Primary action (Ping Wei San layer): Dries dampness, moves qi, and harmonizes the stomach using the Ping Wei San (Calm the Stomach Powder) tradition, directly addressing the cold-damp stagnation in the middle burner that drives digestive signs such as poor appetite, bloating, nausea, and loose stools. This layer differentiates Wei Ling San from Wu Ling San by adding stomach-harmonizing and qi-moving action to the dampness-draining base.
- Secondary action (Poria/Wu Ling San layer): Drains dampness and promotes urination, strengthens the spleen, and warms the bladder yang using the Wu Ling San (Poria Five Formula) tradition, addressing the lower burner dampness accumulation and fluid metabolism deficiency that accompany the spleen qi vacuity pattern, and ensuring dampness is drained through urination as well as dried from the middle burner.
Available Forms
- Powder - Canine Blend (for dogs and cats): Available in 75 g, 150 g, 500 g, 900 g, and 1200 g sizes; mix into food at the recommended dose for your pet's weight. Cats and dogs both use this blend.
- Powder - Equine/Horse Blend (for horses only): Available in 150 g, 500 g, 900 g, and 1200 g sizes; mix into grain at the recommended dose for your horse.
Suggested Use
For Dogs (Canine Blend Powder):
- Under 30 lbs: ½ tsp twice daily, or as prescribed
- 30-80 lbs: 1 tsp twice daily, or as prescribed
- 80-120 lbs: 1½ tsp twice daily, or as prescribed
- Over 120 lbs: 2 tsp twice daily, or as prescribed
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.
Ingredients
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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Active Ingredient TCVM Actions
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:
- Ze Xie (Rhizoma Alismatis Orientalis) - Water Plantain Rhizome: Strongly promotes urination, drains dampness from the lower burner, and clears damp-heat from the kidney and bladder; the primary diuretic herb of the formula's Wu Ling San layer, directly draining the water accumulation and lower burner dampness that accompany the spleen's failure to transform and transport fluids, while also preventing damp-heat from developing as dampness stagnates in the lower burner.
- Fu Ling (Sclerotium Poriae Cocos) - Poria Mushroom: Strengthens the spleen, resolves dampness, and calms the spirit; the name-giving herb of the Wu Ling San and Poria tradition within this formula, tonifying the spleen qi and draining dampness through urination while also supporting the spleen's central role in transforming and transporting fluids, addressing both the deficiency and the excess aspects of the dampness pattern.
- Zhu Ling (Sclerotium Polypori Umbellati) - Polyporus Mushroom: Promotes urination and drains dampness from the lower burner; works with Ze Xie and Fu Ling to powerfully drain accumulated dampness through urination, providing strong diuretic action without adding warmth to the system, making this trio the formula's primary dampness-draining engine.
- Bai Zhu (Rhizoma Atractylodis Macrocephalae) - White Atractylodes Rhizome: Strengthens the spleen qi, dries dampness, and supports the spleen's transforming and transporting functions; addresses the spleen deficiency that is the root cause of dampness accumulation in both the middle and lower burners, and contributes the stomach-harmonizing and dampness-drying action of the Ping Wei San layer by ensuring the spleen can transform and distribute fluids and food normally once the accumulated dampness has been drained.
- Gui Zhi (Ramulus Cinnamomi Cassiae) - Cinnamon Twig: Warms the yang, promotes the transforming functions of qi in the bladder, moves qi through the channels, and guides the dampness-draining herbs to the lower burner; provides the yang-warming action needed to restore the bladder's qi transformation function, and also contributes to qi movement in the middle burner by warming the channels and promoting the free flow of yang qi through the spleen and stomach, supporting both the Wu Ling San and the Ping Wei San layers of the formula.
Potential Drug Interactions
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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Frequently Asked Questions
What conditions is Wei Ling San used for in TCVM?
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.
How is Wei Ling San administered to dogs, cats, and horses?
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.
How long does it take to see results with Wei Ling San?
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.
How does Wei Ling San differ from Wu Ling San in TCVM?
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.