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Herbsmith Rx Shao Yao San is a classical Chinese herbal formula recommended by holistic veterinarians to regulate and harmonize the qi and blood, clear heat, and relieve toxicity in dogs, cats, and horses. Comparable to Peony Powder, it regulates and harmonizes the qi and blood, clears heat, and relieves toxicity, addressing damp-heat accumulation in the intestines with concurrent qi and blood disharmony. A nine-herb formula combining blood-nourishing and harmonizing herbs with damp-heat-clearing, intestinal qi-moving, and interior-warming herbs to address the characteristic pattern of damp-heat in the large intestine presenting with abdominal discomfort, tenesmus, and mucus or blood in the stool alongside qi and blood disharmony. Well suited for pets and horses presenting with damp-heat dysentery-type patterns characterized by abdominal cramping, straining, mucoid or bloody stool, and the concurrent qi and blood disharmony that arises when damp-heat in the intestines disrupts the normal flow of qi and blood through the large intestine channel. 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.
VETERINARY AUTHORIZATION REQUIRED: Submit Your Authorization Request or Request a TCVM Telemedicine Consultation
What It Supports
- Qi and blood harmonization in the intestines: Regulates and harmonizes the qi and blood in the large intestine using Shao Yao as the principal blood-nourishing and cramping-relieving herb, working with Dang Gui's blood-nourishing and invigorating action and Gan Cao's harmonizing action to address the qi and blood disharmony that produces the abdominal cramping, tenesmus, and painful straining characteristic of the damp-heat dysentery-type pattern in dogs, cats, and horses.
- Damp-heat clearing and toxicity relief: Clears damp-heat from the intestines and relieves toxicity using Huang Lian and Huang Qin as the principal heat-clearing and damp-resolving herbs, addressing the damp-heat accumulation in the large intestine that is producing the mucoid or bloody stool, tenesmus, and intestinal inflammation of the damp-heat dysentery pattern, and clearing the toxic heat component that intensifies the intestinal inflammation and drives the blood in stool presentation.
- Intestinal qi movement and stagnation resolution: Moves qi in the intestines and resolves stagnation using Mu Xiang and Bing Lang's descending and qi-moving actions, addressing the qi stagnation and accumulation in the large intestine that produces the tenesmus, abdominal fullness, and straining of the damp-heat pattern, moving the accumulated qi and damp-heat through the intestines and supporting the large intestine's descending and excreting function.
- Heat purging and blood stasis resolution: Purges accumulated heat and resolves blood stasis from the intestines using Da Huang's strong purgative and blood-invigorating action, directly discharging the damp-heat accumulation from the large intestine and addressing the blood stasis component of the pattern that produces the blood in stool, working with the formula's heat-clearing and qi-moving herbs to rapidly clear the damp-heat and restore the large intestine's normal descending function.
TCVM Principles
- Primary action - qi and blood harmonization with damp-heat clearing: Harmonizes the qi and blood and clears damp-heat from the large intestine using the three-directional strategy of nourishing and harmonizing the blood with Shao Yao and Dang Gui to relieve cramping and address the blood disharmony, clearing damp-heat and relieving toxicity with Huang Lian and Huang Qin to address the damp-heat root of the intestinal inflammation and bloody stool, and purging the accumulated heat and blood stasis with Da Huang to rapidly discharge the damp-heat from the large intestine and restore the descending function of the bowel.
- Secondary action - intestinal qi movement and interior warming: Moves intestinal qi and resolves accumulation with Mu Xiang and Bing Lang to address the qi stagnation and tenesmus that accompany the damp-heat pattern in the large intestine, and warms the interior with Guan Gui (cinnamon bark) to balance the cold nature of the formula's multiple bitter-cold heat-clearing herbs (Huang Lian, Huang Qin, Da Huang), preventing the cold-natured herbs from impairing the spleen and stomach yang during treatment and ensuring the formula's strong heat-clearing action does not create middle jiao cold deficiency with extended use. Gan Cao harmonizes all herb interactions and moderates Da Huang's strong purgative action.
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: Shao Yao (Radix Paeoniae), Dang Gui (Radix Angelicae Sinensis), Gan Cao (Radix Glycyrrhizae Uralensis), Mu Xiang (Radix Aucklandiae Lappae), Bing Lang (Semen Arecae Catechu), Huang Lian (Rhizoma Coptidis), Huang Qin (Radix Scutellariae), Da Huang (Radix et Rhizoma Rhei), Guan Gui (Cortex Cinnamomi Loureiroi)
Inactive Ingredient: Flaxseed
VETERINARY AUTHORIZATION REQUIRED: Submit Your Authorization Request or Request a TCVM Telemedicine Consultation
Active Ingredient TCVM Actions
Shao Yao San is a nine-herb formula addressing damp-heat accumulation in the large intestine with qi and blood disharmony through four coordinated herb groups: a blood-nourishing and harmonizing group, a damp-heat-clearing group, an intestinal qi-moving group, and a warming and harmonizing group that balances the formula's cold-natured herbs:
- Shao Yao (Radix Paeoniae) - Peony Root: Principal herb; nourishes the blood, softens the liver, relieves cramping and abdominal discomfort, and harmonizes the ying level; the foundational blood-nourishing and cramping-relieving herb of the formula, addressing the qi and blood disharmony in the large intestine that produces the abdominal cramping, tenesmus, and painful straining of the damp-heat dysentery pattern, working with Dang Gui and Gan Cao to restore the blood's nourishing and harmonizing function in the intestines alongside the damp-heat-clearing action of the formula's bitter-cold herbs.
- Dang Gui (Radix Angelicae Sinensis) - Dong Quai Root: Tonifies and invigorates the blood, nourishes the liver, and relieves stiffness; contributes blood nourishment and mild blood-invigorating action to support Shao Yao's blood-harmonizing role, ensuring the blood in the large intestine is nourished, and the blood stasis component of the bloody stool pattern is addressed alongside the damp-heat clearing, working with Shao Yao to provide the formula's combined blood-nourishing and harmonizing foundation.
- Gan Cao (Radix Glycyrrhizae Uralensis) - Licorice Root: Harmonizes the formula, moderates cramping, tonifies the spleen qi, and relieves toxicity; the harmonizing herb that coordinates the interactions between the formula's blood-nourishing, heat-clearing, purgative, and qi-moving herbs, moderates Da Huang's strong purgative action, and, working with Shao Yao, provides the classical Shao Yao-Gan Cao combination for relieving abdominal cramping and smooth muscle stiffness in the large intestine.
- Mu Xiang (Radix Aucklandiae Lappae) - Costus Root / Aucklandia Root: Moves qi in the spleen, stomach, and large intestine, and relieves intestinal stagnation; the principal intestinal qi-moving herb that addresses the qi stagnation and accumulation in the large intestine driving the tenesmus, abdominal fullness, and straining of the damp-heat pattern, moving the stagnant intestinal qi to restore the large intestine's normal descending and excreting function and working with Bing Lang to provide comprehensive intestinal qi movement.
- Bing Lang (Semen Arecae Catechu) - Betel Nut / Areca Seed: Moves qi, promotes the movement of stagnation through the intestines, and descends rebellious qi; contributes additional intestinal qi-moving and descending action that works with Mu Xiang to dispel the qi stagnation and accumulated damp-heat through the large intestine, supporting the formula's purgative action by ensuring the intestinal qi is moving freely to escort the damp-heat downward and out.
- Huang Lian (Rhizoma Coptidis) - Coptis Rhizome / Goldthread: Clears heat, dries dampness, and relieves fire toxicity in the heart and gastrointestinal tract; the principal damp-heat-clearing herb targeting the intestinal damp-heat accumulation, one of the most potent heat-clearing and damp-drying herbs in the Chinese materia medica and specifically effective for clearing damp-heat from the middle and lower jiao, addressing the intestinal inflammation, toxic heat, and damp accumulation that drive the mucoid and bloody stool pattern of the damp-heat dysentery presentation.
- Huang Qin (Radix Scutellariae) - Scutellaria Root / Baikal Skullcap Root: Clears heat, dries dampness, and relieves fire toxicity, particularly in the upper jiao and large intestine; the second principal heat-clearing herb, working with Huang Lian to provide comprehensive damp-heat clearing from the intestines, specifically targeting the large intestine heat and the toxic heat component of the bloody stool and intestinal inflammation pattern. Requires monitoring in animals on hepatically metabolized pharmaceuticals due to its effects on cytochrome P450 pathways.
- Da Huang (Radix et Rhizoma Rhei) - Rhubarb Root and Rhizome: Purges accumulations and clears heat from the intestines, invigorates blood, and dispels blood stasis; the purgative herb that directly discharges the accumulated damp-heat from the large intestine through its strong descending and purgative action, simultaneously invigorating the blood and dispelling the blood stasis component of the bloody stool pattern, making it the key herb for rapidly clearing the intestinal damp-heat accumulation when the pattern is acute or the heat accumulation is substantial. Requires careful dosing and veterinary monitoring; has significant interactions with anticoagulant medications and may affect the absorption of concurrently administered pharmaceuticals.
- Guan Gui (Cortex Cinnamomi Loureiroi) - Cassia Bark / Chinese Cinnamon Bark: Warms the interior, disperses cold, moves qi and blood, and alleviates discomfort; the warming counterbalance that prevents the formula's three cold-natured heat-clearing herbs (Huang Lian, Huang Qin, Da Huang) from damaging the spleen and stomach yang during treatment, ensuring the middle jiao yang is protected while the damp-heat is being cleared from the large intestine, and contributing qi and blood-moving action that supports the formula's overall qi and blood harmonizing strategy.
Potential Drug Interactions
Shao Yao San contains Da Huang (rhubarb), which has significant laxative and purgative effects and can affect the absorption and transit time of concurrently administered pharmaceuticals, potentially reducing drug absorption when medications and the formula are given in close proximity. Da Huang also has blood-invigorating properties that require monitoring in animals on anticoagulant or antiplatelet medications. Huang Qin has documented effects on cytochrome P450 hepatic enzyme pathways that may alter the metabolism and blood levels of hepatically metabolized pharmaceuticals. Pets on any prescription medications should have the authorizing veterinarian review the full medication list before starting this formula, with particular attention to the timing of drug administration relative to the formula to minimize absorption interactions from Da Huang's purgative effects.
Medication categories warranting extra caution include anticoagulant and antiplatelet medications (Da Huang's blood-invigorating effects), hepatically metabolized pharmaceuticals (Huang Qin's CYP450 effects), any oral medication whose absorption could be affected by accelerated intestinal transit (Da Huang's purgative action), immunosuppressive medications, antidiarrheal medications (where Da Huang's purgative action may counteract the intended effect), and antidiabetic medications. Your authorizing veterinarian will determine appropriateness based on your animal's condition, current medications, and laboratory results.
VETERINARY AUTHORIZATION REQUIRED: Submit Your Authorization Request or Request a TCVM Telemedicine Consultation
Frequently Asked Questions
What conditions is Shao Yao San used for in TCVM?
In Traditional Chinese Veterinary Medicine, Shao Yao San is indicated for damp-heat accumulation in the large intestine with concurrent qi and blood disharmony, presenting with abdominal cramping, tenesmus, straining, and mucoid or bloody stool that reflects the combined damp-heat and blood stasis pattern in the large intestine. Comparable to Peony Powder, it is the classical formula for the damp-heat dysentery-type pattern, where intestinal damp-heat disrupts the normal flow of qi and blood through the large intestine, producing the characteristic cramping-tenesmus-bloody or mucoid stool triad. Your authorizing veterinarian will determine whether the pattern reflects damp-heat in the large intestine or another cause of bloody or mucoid stool before initiating this formula.
How is Shao Yao San administered to dogs, cats, and horses?
Mix the powder directly into food or grain at the dose recommended for your animal's species and body weight. 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. 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. Your authorizing veterinarian will confirm the appropriate dose, schedule, and treatment duration for your individual animal, and will review the full medication list given Da Huang's effects on drug absorption and anticoagulant interaction risk.
How long does it take to see results with Shao Yao San?
Because Shao Yao San is formulated for an active damp-heat pattern with Da Huang as a purgative component, improvement in stool consistency, straining, and abdominal cramping is often seen within 1 to 3 weeks when the pattern is actively damp-heat predominant. Treatment duration depends on the severity and chronicity of the damp-heat accumulation; acute presentations may resolve more quickly, while animals with longstanding damp-heat in the large intestine may require a longer treatment course with periodic reassessment. Your veterinarian will monitor the pattern's response and adjust dosing and duration as the damp-heat clears and the qi and blood disharmony resolves.
How does Shao Yao San differ from other TCVM formulas for digestive and intestinal patterns?
Shao Yao San is specifically formulated for damp-heat accumulation in the large intestine with qi and blood disharmony, making it distinct from formulas that address spleen qi deficiency with damp accumulation (Shen Ling Bai Zhu San), cold-type diarrhea patterns, or large intestine patterns without the heat-clearing and purgative components. Its inclusion of Da Huang as an active purgative and Huang Lian and Huang Qin as strong damp-heat-clearing herbs makes it appropriate for active, heat-predominant intestinal patterns rather than deficiency-type loose stool patterns, and the addition of Guan Gui to balance the cold-natured herbs reflects the classical approach of protecting the middle yang while clearing intestinal heat. Your authorizing veterinarian will determine which intestinal formula best matches your animal's specific TCVM pattern based on whether heat, cold, deficiency, or damp accumulation is predominant.
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