Your shopping bag is empty
Go to the shop

Herbsmith Rx Xiao Chai Hu San is a classical Chinese herbal formula recommended by holistic veterinarians to support harmonization of the lesser yang stage and resolution of half-exterior, half-interior disorders in dogs, cats, and horses. Based on the traditional formula Xiao Chai Hu Tang (also known as Minor Bupleurum Powder), it harmonizes and releases lesser yang-stage disorders. It is well suited for pets presenting with alternating fever and chills, intermittent appetite changes, nausea or vomiting, flank fullness or tightness, irritability, and a wiry pulse arising from pathogens lodged in the shao yang (lesser yang) stage between the exterior and interior. 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 - Click Here to Submit Your Authorization Request
Request a TCVM Telemedicine Consultation
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: Chai Hu (Radix Bupleuri), Huang Qin (Radix Scutellariae), Ban Xia (Rhizoma Pinelliae Ternatae), Sheng Jiang (Rhizoma Zingiberis Officinalis Recens), Ren Shen (Radix Ginseng), Zhi Gan Cao (Honey-fried Radix Glycyrrhizae Uralensis), Da Zao (Fructus Zizyphi Jujubae)
Inactive Ingredient: Flaxseed
Veterinary Authorization Required - Click Here to Submit Your Authorization Request
Request a TCVM Telemedicine Consultation
Xiao Chai Hu San is a seven-herb formula that balances releasing and harmonizing herbs with qi-tonifying and middle-burner-supporting herbs to address the lesser yang pattern without depleting the body's right qi in the process:
Xiao Chai Hu San contains liver-regulating, heat-clearing, and qi-tonifying herbs including Chai Hu, Huang Qin, and Ren Shen, which have significant hepatic-metabolizing, immune-modulating, and cardiovascular-influencing properties. Ren Shen in particular warrants close veterinary monitoring in pets on cardiac medications or stimulant therapies, as it can influence heart rate, blood pressure, and the metabolism of certain drugs. Pets currently on prescription medications should use this formula under veterinary supervision, as herb-drug interaction research in dogs and cats remains limited.
Medication categories warranting extra caution include cardiac medications, anticoagulant or antiplatelet medications, immunosuppressive drugs, corticosteroids, diuretics, and pets managing multiple concurrent prescriptions. Your authorizing veterinarian can determine appropriateness based on your pet's condition, current medications, and laboratory results.
Veterinary Authorization Required - Click Here to Submit Your Authorization Request
Request a TCVM Telemedicine Consultation
In Traditional Chinese Veterinary Medicine, Xiao Chai Hu San is indicated for lesser yang-stage (shao yang) disorders, presenting as alternating fever and chills, intermittent appetite changes, nausea or vomiting, flank fullness or tightness, irritability, and a wiry pulse. Also known as Minor Bupleurum Powder, it is appropriate for pets whose presentations reflect a pathogen lodged in the half-exterior, half-interior space of the shao yang stage, where the pathogen can no longer be released through the exterior but has not yet penetrated fully into the interior.
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 for your individual pet.
As a formula designed to harmonize and release an active lesser yang-stage pattern, Xiao Chai Hu San is intended to act relatively promptly when the pattern is well matched. Many pets show improvement in fever patterns, appetite, nausea, and flank tightness within 1 to 3 weeks of consistent use. If the presentation shifts, such as signs moving fully to the interior or resolving to the exterior, the pattern may have changed, and your veterinarian may recommend transitioning to a different formula appropriate to the current stage.
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 Ren Shen, which can influence cardiac function and drug metabolism, and Chai Hu, which is processed by the liver and may affect the metabolism of certain medications, veterinary oversight is especially important if your pet is on cardiac medications, immunosuppressive drugs, or corticosteroids, to ensure the treatment plan is appropriate for your pet's overall health status.
how many mg/tsp is the powder?
Hi, thank you for your question!
The 75g powder contains about 38 teaspoons per bottle.
Thank you for supporting Traditional Chinese Veterinary Medicine!