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Herbsmith Rx Rehmannia Settle Anxiety is a classical Chinese herbal formula recommended by holistic veterinarians to calm the spirit, nourish the heart and kidney yin, tonify the blood, and support balanced behavior in dogs and cats exhibiting nervousness, hyperactivity, and discontentment from environmentally induced stress. Rehmannia Settle Anxiety helps maintain contentment during separation, travel, and tension caused by changes in the pet's daily routine by addressing the underlying heart-kidney yin vacuity and blood insufficiency pattern that allows the shen to become unsettled. This formula is the veterinary adaptation of the classical Tian Wang Bu Xin Dan (Emperor of Heaven's Special Pill to Tonify the Heart), one of the most complete and clinically respected heart and kidney yin-nourishing shen-calming formulas in the Chinese herbal tradition. In Chinese medicine, the heart not only pumps blood but also houses the shen (spirit), helping it remain settled and content in the world. In a healthy dog or cat, the heart fire (yang) and the kidney water (yin) are in dynamic balance, with the kidney yin nourishing and anchoring the heart fire and the heart fire warming the kidney yang. Excessive emotional or physical stress and aging can diminish normal kidney yin, leading to an inability to anchor and control the heart shen; when the heart is not nourished by sufficient yin and blood, the shen loses its stable residence, and characteristic nervousness, hyperactivity, and discontentment emerge. Rehmannia Settle Anxiety addresses this pattern through three simultaneous strategies: nourishing the kidney and heart yin (Sheng Di Huang, Tian Men Dong, Mai Men Dong, Xuan Shen), tonifying the heart blood (Dang Gui, Dan Shen), and directly calming the shen (Suan Zao Ren, Bai Zi Ren, Yuan Zhi, Fu Ling) while supporting the qi and directing the formula's action through the heart channel (Ren Shen, Wu Wei Zi, Jie Geng). Well suited for dogs and cats presenting with the heart and kidney yin vacuity with blood insufficiency pattern, characterized by a red or pale-red tongue with little or no coating reflecting yin vacuity; nervousness, restlessness, or hyperactivity that worsens with stress or environmental change; occasional waking at night or difficulty settling; mild heat signs from yin vacuity; and a thin or thin-rapid pulse. Available as a concentrated powder mixed into food. 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
For Dogs (Powder):
For Cats (Powder): ¼ tsp twice daily, or as prescribed
Active Ingredients: Sheng Di Huang (Raw Rehmannia Root), Tian Men Dong (Asparagus Tuber), Mai Men Dong (Ophiopogon Tuber), Dang Gui (Angelica Tang Kuei), Wu Wei Zi (Schisandra Fruit), Bai Zi Ren (Biota Seed), Suan Zao Ren (Jujube Seed), Ren Shen (Ginseng), Xuan Shen (Scrophularia), Dan Shen (Salvia), Fu Ling (Poria), Yuan Zhi (Polygala), Jie Geng (Platycodon)
Inactive Ingredient: Flaxseed
VETERINARY AUTHORIZATION REQUIRED: Submit Your Authorization Request or Request a TCVM Telemedicine Consultation
Rehmannia Settle Anxiety is the veterinary adaptation of the classical Tian Wang Bu Xin Dan, a thirteen-herb formula organized around four therapeutic strategies: kidney and heart yin nourishment (Sheng Di Huang, Tian Men Dong, Mai Men Dong, Xuan Shen), heart blood tonification and activation (Dang Gui, Dan Shen), shen calming through multiple routes (Suan Zao Ren, Bai Zi Ren, Yuan Zhi, Fu Ling), and qi support with formula directing (Ren Shen, Wu Wei Zi, Jie Geng):
Rehmannia Settle Anxiety has a significant drug interaction profile given its combination of blood-activating and yin-nourishing herbs. The primary anticoagulant concern is Dan Shen's tanshinone and salvianolic acid content, which can significantly potentiate the effects of warfarin and other anticoagulant and antiplatelet medications; animals on anticoagulant therapy require veterinary review before starting this formula. Dang Gui's coumarin and ferulic acid content adds to the anticoagulant concern, making the combined Dan Shen and Dang Gui presence particularly important to flag for animals on blood-thinning medications. Ren Shen's ginsenoside content warrants monitoring in animals on MAOIs (do not use concurrently), stimulants, antidiabetic medications (combined glucose-lowering effects), and anticoagulants. Wu Wei Zi's schisandrin content modulates hepatic CYP3A4 and CYP2C9 enzyme activity, warranting monitoring in animals on cyclosporine, tacrolimus, chemotherapy agents, anticonvulsants, and other hepatically metabolized medications. Suan Zao Ren's mild calming spinosin and jujuboside content warrants monitoring in animals on sedatives or anxiolytic medications where combined calming effects could be excessive.
Medication categories warranting extra caution: anticoagulant and antiplatelet medications (Dan Shen and Dang Gui combined anticoagulant effects - primary concern), MAOIs (Ren Shen - do not use concurrently), antidiabetic medications (Ren Shen glucose-lowering effects), hepatically metabolized medications subject to CYP3A4 and CYP2C9 interaction (Wu Wei Zi schisandrin), and sedatives and anxiolytics (Suan Zao Ren mild calming effects). Because behavioral signs in dogs and cats can have multiple underlying causes, including pain, neurological conditions, and metabolic disease, veterinary assessment is important before attributing the presentation to the heart-kidney yin vacuity pattern. Your authorizing veterinarian will determine appropriateness based on your pet's condition, current medications, tongue quality, pulse character, and clinical assessment of the behavioral signs.
VETERINARY AUTHORIZATION REQUIRED: Submit Your Authorization Request or Request a TCVM Telemedicine Consultation
In Traditional Chinese Veterinary Medicine, Rehmannia Settle Anxiety is indicated for the heart and kidney yin vacuity pattern with unsettled shen, which manifests behaviorally as nervousness, hyperactivity, and discontentment triggered by environmentally induced stress, including separation, travel, and changes in daily routine. The clinical presentation includes a red or pale-red tongue with little or no coating reflecting yin vacuity; behavioral restlessness and hyperactivity that worsen with stress or environmental change; occasional nighttime waking or difficulty settling from shen disturbance; mild heat signs from yin vacuity heat; and a thin or thin-rapid pulse. This formula is best suited for stress-sensitive animals whose behavioral responses stem from the heart-kidney yin vacuity pattern and is not appropriate for behavioral issues from liver qi stagnation (requiring qi-moving strategies), heart fire blazing from excess (requiring heat-draining strategies), or fear-based responses from different constitutional patterns. Veterinary tongue and pulse examination is important to confirm the heart-kidney yin vacuity pattern before initiating treatment.
Mix the powder into food at the dose recommended for your pet's species and body weight. All variants are the Canine Blend powder, which is used for both dogs and cats. Because Rehmannia Settle Anxiety contains Dan Shen with significant anticoagulant effects, Ren Shen with MAOI interaction potential, and Wu Wei Zi with hepatic CYP enzyme modulation, veterinary review of all current medications is important before use. In particular, animals on warfarin or other anticoagulant medications, animals on MAOIs, and animals on hepatically metabolized medications require veterinary assessment of interaction potential before initiating this formula. For animals already on sedatives or anxiolytic medications, inform your veterinarian so they can account for the combined calming effects of Suan Zao Ren.
As a formula addressing the deep heart and kidney yin level, Rehmannia Settle Anxiety requires sustained treatment before the full shen-calming effect is seen. Some improvement in the most responsive behavioral signs (slight reduction in reactivity to environmental stressors, mild improvement in settling ability) may be seen within 3 to 5 weeks as the formula's shen-calming seeds (Suan Zao Ren, Bai Zi Ren) and qi-astringing herb (Wu Wei Zi) begin to consolidate the shen. More sustained improvement in the underlying nervousness and hyperactivity pattern, reflecting meaningful replenishment of the heart-kidney yin and heart blood, typically requires 6 to 12 weeks of consistent use as the yin-nourishing herbs rebuild the constitutional yin reserves. In animals with chronic or severe heart-kidney yin vacuity, long-term maintenance use under veterinary supervision is often appropriate. Your authorizing veterinarian will monitor tongue quality, pulse character, and behavioral signs throughout.
Combining Rehmannia Settle Anxiety with other calming supplements or medications requires veterinary guidance because of the formula's significant drug interaction profile. The primary concern with combination use is the anticoagulant interaction risk from Dan Shen and Dang Gui when combined with other blood-thinning supplements (fish oil at high doses, vitamin E, nattokinase) or medications. Combining with sedative medications or anxiolytic drugs requires veterinary monitoring of combined calming effects given Suan Zao Ren's mild sedative-like activity. Combining with other adaptogenic supplements containing ginseng or similar ginsenoside-containing herbs requires review of Ren Shen's interaction profile. Within the TCVM framework, Rehmannia Settle Anxiety is specifically formulated for the heart-kidney yin vacuity pattern and works most effectively when the correct pattern has been confirmed; combining with formulas addressing different patterns (liver qi stagnation, heart fire) without veterinary guidance may not provide additional benefit and could create unbalanced therapeutic effects. Your authorizing veterinarian will provide guidance on appropriate combination strategies based on your pet's complete clinical picture.
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