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Herbsmith Rx Er Chen San for Cats, Dogs and Horses

$70.00

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Herbsmith Rx Er Chen San for Cats, Dogs and Horses

Veterinary Authorization Required for TCVM Herbal Formulas - TCVM Pet Supply

Herbsmith Rx Er Chen San is a classical Chinese herbal formula recommended by holistic veterinarians to dry dampness, transform phlegm, regulate the qi, and harmonize the middle burner in dogs, cats, and horses. Also known as Two Cured Powder, Two Cured Soup, Lucid Channel, and Citrus and Pinella Formula, this four-herb formula from the Tai Ping Hui Min He Ji Ju Fang (Formulary of the Bureau of Peoples Welfare Pharmacies, Song dynasty, 1107 CE) is a foundational phlegm-transforming formula of the classical Chinese herbal tradition and a base for many specialized phlegm formulas. The formula's name Er Chen (Two Cured) refers to the two principal herbs Ban Xia (pinellia rhizome) and Ju Hong (red tangerine peel), traditionally aged or cured before use. Processing details should be confirmed against the selected product's label; traditional preparation does not by itself establish the finished product's safety. The formula addresses three principal TCVM phlegm-damp patterns: Phlegm Damp Obstructing the Lungs (cough, mucus, respiratory congestion), Phlegm Rheum Abdominal Distension (digestive phlegm-damp accumulation, nausea, vomiting from phlegm obstruction of the middle jiao), and Phlegm Panting (labored breathing and panting from phlegm obstructing the lung qi's descending function). Well suited for dogs, cats, and horses presenting with the phlegm-damp pattern, characterized by productive cough with mucus or phlegm sounds from phlegm obstructing the lung qi, labored breathing or panting from phlegm obstruction, nausea and vomiting from phlegm accumulation in the middle jiao, reduced appetite and digestive disturbance from phlegm-damp obstructing the spleen and stomach, a pale or slightly dusky tongue with a white greasy or slippery coating reflecting the phlegm-damp accumulation, and a slippery pulse reflecting the phlegm and dampness. These pattern descriptions are not a substitute for veterinary diagnosis; labored breathing or respiratory distress requires immediate veterinary care. 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

  • Phlegm transformation and dampness drying through Ban Xia: Transforms phlegm and dries dampness through Ban Xia (processed pinellia rhizome), the principal herb of the formula and a major phlegm-transforming herb in the classical materia medica. Ban Xia's acrid, warm, and drying nature disperses accumulated phlegm in the lung, middle jiao, and channels, addressing phlegm formed from dampness accumulation due to the spleen's failure to transform and transport fluid. Ban Xia also descends rebellious stomach qi, addressing nausea and vomiting from phlegm obstruction of the middle jiao, dries dampness in the spleen and stomach, and traditionally scatters phlegm nodules that form when phlegm accumulates in the channels and tissues. Raw Ban Xia contains irritant calcium oxalate crystals and must not be substituted for the processed ingredient. Confirm the actual processing method with the manufacturer; processing does not eliminate the need for veterinary oversight.
  • Qi regulation and phlegm movement through Ju Hong: Regulates the qi and assists in phlegm transformation through Ju Hong (red tangerine peel), the second of the two cured herbs and the qi-regulating complement to Ban Xia's phlegm-transforming action. Traditionally described as the red outer layer of tangerine peel, Ju Hong moves lung qi and spleen qi, dries dampness, and supports the spleen's transforming function. Its qi-regulating role addresses the TCVM principle that phlegm accumulates when qi stagnates: when spleen qi fails to transform and lung qi fails to descend and disperse, fluid accumulates and congeals into phlegm. Ju Hong's aromatic action moves qi and complements Ban Xia's dampness-drying strategy. The ingredient identity and aging details should be checked against the manufacturer's label.
  • Spleen strengthening and dampness drainage through Fu Ling: Strengthens the spleen and drains dampness through Fu Ling (poria, tuckahoe), the supporting herb that addresses the spleen qi vacuity root from which phlegm-damp accumulation arises. In TCVM, the spleen transforms and transports fluids; when spleen qi is insufficient, fluid accumulates and congeals into phlegm and dampness. Fu Ling supports this transforming and transporting function and promotes water metabolism. Its gentle spirit-calming action is a secondary traditional action, not a reason to use this formula for neurological presentations without veterinary pattern assessment. Fu Ling complements Ban Xia's dampness-drying and Ju Hong's qi-moving: together the three herbs address phlegm through transformation, qi movement, and spleen support with water drainage.
  • Harmonizing and moderating through Zhi Gan Cao: Harmonizes the formula through Zhi Gan Cao (honey-fried licorice root), coordinating the phlegm-transforming and qi-moving herbs and moderating their drying and dispersing actions. It provides mild spleen qi tonification and middle jiao moistening, balancing the other herbs' drying, moving, or draining nature. This harmonizing role supports digestive tolerance but does not guarantee freedom from adverse effects or interactions.

TCVM Principles

  • Primary action, foundational phlegm-damp transformation: Addresses phlegm-damp through four complementary actions: Ban Xia transforms phlegm and dries dampness; Ju Hong regulates qi; Fu Ling supports the spleen and drains dampness; and Zhi Gan Cao harmonizes the formula. The strategy reflects the TCVM understanding that phlegm is generated by impaired spleen fluid transformation, maintained by impaired lung qi descent and dispersal, and perpetuated by middle jiao qi stagnation. The formula addresses both accumulated phlegm and the functional pattern associated with its formation.
  • Classical antecedent and derived formulas: Er Chen San belongs to the classical phlegm-treatment tradition associated with the Tai Ping Hui Min He Ji Ju Fang. Its core informs specialized strategies such as Wen Dan Tang, with additional qi-regulating and phlegm-heat-clearing herbs; Qing Qi Hua Tan Wan, directed toward lung phlegm-heat; and Di Tan Tang and Dao Tan Tang, which use stronger phlegm-transforming and channel- or orifice-opening strategies. Similarities between formulas do not make them interchangeable; selection depends on the pattern's location, thermal character, and accompanying signs.
  • Pattern cautions: Appropriate for phlegm-damp patterns with cold or neutral thermal character, such as a white greasy tongue coating, slippery pulse, and copious thin phlegm. Not appropriate as the unmodified formula for phlegm-heat, yin vacuity dryness with thick sticky phlegm, or wind-phlegm with tremors or seizures; these require a different veterinarian-directed strategy.
  • Preparation and urgent signs: Use only the prescribed processed ingredient preparation. Do not substitute raw Ban Xia. Labored breathing or respiratory distress requires immediate veterinary care; do not wait for an herbal response.

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

  • Canine Blend Powder - Dogs under 30 lbs: ½ tsp twice daily, or as directed by your veterinarian.
  • Canine Blend Powder - Dogs 30-80 lbs: 1 tsp twice daily, or as directed by your veterinarian.
  • Canine Blend Powder - Dogs 80-120 lbs: 1½ tsp twice daily, or as directed by your veterinarian.
  • Canine Blend Powder - Dogs over 120 lbs: 2 tsp twice daily, or as directed by your veterinarian.
  • Canine Blend Powder - Cats: ¼ tsp twice daily, or as directed by your veterinarian.
  • Equine/Horse Blend - 1,000 lb horse, initial dose: Two tablespoons twice daily, or as directed by your veterinarian. Continue the initial schedule for 20 days, or as directed by your veterinarian.
  • Equine/Horse Blend - 1,000 lb horse, maintenance dose: After the initial period, give two tablespoons once daily in grain, or as directed by your veterinarian.

If the horse initially refuses, start with a small amount mixed into grain and gradually increase until accustomed to the taste, or as directed by your veterinarian. Most horses will readily accept the herbs in their grain. Confirm the dog dose at the overlapping 80 lb boundary with your authorizing veterinarian. Veterinary authorization and medication review are required. Do not use for yin vacuity dryness, phlegm-heat, or wind-phlegm neurological presentations without a different veterinarian-directed strategy. Continue for the prescribed duration, or as directed by your veterinarian. Seek immediate veterinary care for labored breathing or respiratory distress.

Ingredients

Active Ingredients: Ban Xia (Rhizoma Pinelliae Ternatae) - Pinellia rhizome; Ju Hong (Pericarpium Citri Erythrocarpae) - Red tangerine peel; Fu Ling (Sclerotium Poriae Cocos) - Poria; Zhi Gan Cao (Honey-fried Radix Glycyrrhizae Uralensis) - Honey-fried licorice root.

Inactive Ingredient: Flaxseed.

Ingredient information: Names retain the existing listing information. Exact botanical species, citrus identity, and Ban Xia processing details have not been independently verified against a current manufacturer label. Confirm the selected blend's ingredient and preparation details with the manufacturer and your authorizing veterinarian.

VETERINARY AUTHORIZATION REQUIRED: Submit Your Authorization Request or Request a TCVM Telemedicine Consultation

Active Ingredient TCVM Actions

Er Chen San combines four complementary roles: Ban Xia transforms phlegm and dries dampness as the principal herb; Ju Hong moves qi and assists phlegm transformation as the associate herb; Fu Ling strengthens the spleen and drains dampness as the supporting herb; and Zhi Gan Cao harmonizes and moderates as the envoy herb:

  • Ban Xia (Rhizoma Pinelliae Ternatae) - Pinellia Rhizome / Half Summer: Dries dampness, transforms phlegm, descends rebellious stomach qi, and traditionally dissipates phlegm nodules. Its warm, acrid, drying nature addresses the phlegm-damp substrate, while its descending action supports middle jiao harmony when phlegm obstructs stomach qi. Raw Ban Xia is toxic and can cause severe mucosal irritation; do not substitute it for a prescribed processed preparation. Confirm the manufacturer's processing method rather than assuming ginger or alum processing from the formula name alone. Processing does not establish absence of toxicity. Veterinary review is required with medications affecting cholinergic function and in animals with dryness; the formula is not appropriate when phlegm stems from yin vacuity rather than damp-cold accumulation.
  • Ju Hong (Pericarpium Citri Erythrocarpae) - Red Tangerine Peel / Erythrocarpa Citrus Peel: Regulates qi, dries dampness, transforms phlegm, and harmonizes the middle jiao; the qi-regulating associate that complements Ban Xia's phlegm transformation. Traditional aging of the citrus ingredient is part of the formula's Two Cured history. The existing ingredient wording does not independently establish the exact citrus species, peel preparation, or constituent content. Review concurrent medications with the veterinarian, especially medications processed by liver enzymes with narrow therapeutic ranges, rather than assuming interactions cannot occur at a particular dose.
  • Fu Ling (Sclerotium Poriae Cocos) - Poria / Hoelen / Tuckahoe: Strengthens the spleen and stomach, promotes water metabolism, drains dampness, and calms the spirit. Its spleen-supporting action addresses the fluid transformation pattern underlying phlegm-damp accumulation; its water-draining action complements the formula's drying and qi-moving actions. Spirit calming is a secondary traditional action. Its water-promoting role warrants review in animals taking diuretics.
  • Zhi Gan Cao (Honey-fried Radix Glycyrrhizae Uralensis) - Honey-fried Licorice Root: Tonifies spleen qi, moistens and harmonizes the middle jiao, and moderates the formula's drying and dispersing herbs. Honey-fried licorice provides a moistening and qi-supporting complement to Ban Xia, Ju Hong, and Fu Ling. Sustained use warrants medication review, particularly with corticosteroids, diuretics, and antihypertensive medications.

Potential Drug Interactions

Er Chen San contains phlegm-transforming and drying Ban Xia, aromatic qi-regulating Ju Hong, damp-draining Fu Ling, and honey-fried licorice root (Zhi Gan Cao). These ingredient groups warrant review alongside prescription medications. Pets taking prescription medications should use this formula under veterinary supervision because herb-drug interaction research in dogs and cats is limited. Horses taking prescription medications also require veterinary review. Confirm Ban Xia's processed preparation before use. The drying strategy is not appropriate for yin vacuity dryness, and unmodified Er Chen San is not appropriate for phlegm-heat or wind-phlegm neurological presentations.

Medication categories warranting extra caution include anticholinergic or cholinergic medications, corticosteroids, diuretics, antihypertensive medications, medications processed by liver enzymes with narrow therapeutic ranges including cyclosporine and tacrolimus, and multiple concurrent prescriptions. Your authorizing veterinarian can determine appropriateness based on your animal's condition, current medications, and laboratory results, together with tongue, pulse, and assessment of the phlegm pattern's thermal character and location.

VETERINARY AUTHORIZATION REQUIRED: Submit Your Authorization Request or Request a TCVM Telemedicine Consultation

Frequently Asked Questions

What conditions is Er Chen San used for in TCVM?

In Traditional Chinese Veterinary Medicine, Er Chen San is selected for phlegm-damp patterns in the lung and middle jiao. Respiratory presentations may include a mucus-associated cough and congestion; digestive presentations may include reduced appetite, abdominal fullness, and nausea or vomiting in species that can vomit. These signs require veterinary diagnosis, not self-selection of a formula. The traditional pattern commonly includes a pale or slightly dusky tongue with a white greasy or slippery coating and a slippery pulse. Your authorizing veterinarian distinguishes this from phlegm-heat, yin vacuity phlegm, and wind-phlegm with neurological signs, which require different strategies. Labored breathing or respiratory distress is an emergency and should not be managed by waiting for an herbal response.

How is Er Chen San administered to dogs, cats, and horses?

Mix the powder into food or grain. Dogs and cats use the Canine Blend. For dogs under 30 lbs, give ½ tsp twice daily, or as directed by your veterinarian. For dogs 30-80 lbs, give 1 tsp twice daily, or as directed by your veterinarian. For dogs 80-120 lbs, give 1½ tsp twice daily, or as directed by your veterinarian. For dogs over 120 lbs, give 2 tsp twice daily, or as directed by your veterinarian. For cats, give ¼ tsp twice daily, or as directed by your veterinarian. Confirm the dog dose at the overlapping 80 lb boundary with your authorizing veterinarian.

Horses use the Equine/Horse Blend. For a 1,000 lb horse, give two tablespoons twice daily, or as directed by your veterinarian. Continue the initial schedule for 20 days, or as directed by your veterinarian. Then give two tablespoons once daily in grain, or as directed by your veterinarian. If the horse initially refuses, start with a small amount mixed into grain and gradually increase until accustomed to the taste, or as directed by your veterinarian. Review all current medications before use. Your veterinarian will guide any transition to a spleen-supporting maintenance strategy as the pattern changes.

How is progress assessed with Er Chen San?

Your veterinarian will assess the diagnosed respiratory or digestive condition, appetite, comfort, mucus-associated signs, tongue coating, and pulse alongside any appropriate clinical testing. Response timing varies with the cause and duration of the signs and concurrent care; a fixed improvement timeline cannot be promised. Continue for the prescribed duration, or as directed by your veterinarian. Reassessment helps determine whether phlegm-damp remains present or the formula should be changed. Labored breathing or respiratory distress requires immediate veterinary care rather than waiting for a scheduled reassessment.

What is the relationship between Er Chen San and other phlegm formulas?

Er Chen San provides a foundational combination of phlegm transformation, qi regulation, spleen support, and harmonization. Other formulas develop related strategies by adding herbs for particular patterns: Wen Dan Tang includes Zhu Ru and Zhi Shi for a different qi-regulating and phlegm-heat strategy; Qing Qi Hua Tan Wan adds lung heat-clearing and phlegm-transforming ingredients; and Di Tan formulas use stronger phlegm-transforming and orifice-opening strategies for distinct presentations. The shared framework does not make these formulas interchangeable. Your authorizing veterinarian selects the formula according to the animal's diagnosis, thermal pattern, tissue location, and accompanying signs.

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