Which Herbal Remedies Work for Both Humans and Pets?
Pet owners, we often look for natural ways to support our own health and then wonder: Can the same herbs help my cat or dog? The answer is sometimes yes, but caution is essential. While many functional herbs have overlapping benefits for humans and pets, species differences, dosing, and individual sensitivities matter greatly. Below, we break down four popular remedies—valerian root, chamomile, CBD, and milk thistle—explaining what they can do for people and whether they are safe and effective for your furry companions.
Valerian Root

For Humans
Valerian is widely used as a mild sedative and sleep aid. It works by increasing levels of a neurotransmitter called GABA, which calms the nervous system. Humans take it to reduce anxiety, improve sleep quality, and ease muscle tension. It is considered generally safe for short-term use.
For Pets
Valerian can have a similar calming effect on dogs and cats, but the reactions vary. In dogs, it is often used for travel anxiety, noise phobias (like fireworks or thunderstorms), and hyperactivity. A small number of dogs may actually become excited rather than relaxed. For cats, valerian is less predictable: while some cats become more relaxed, others experience mild euphoria—similar to catnip—and become playful.
Important: Always use veterinary-formulated doses. Human products may contain added ingredients (like alcohol or xylitol) that are to pets. Start with a low dose and observe your pet’s reaction.
Chamomile

For Humans
Chamomile is best known for its calming and anti-inflammatory properties. Humans drink it as a tea to soothe stomach upset, ease anxiety, and promote restful sleep. Its active compounds, including apigenin, bind to brain receptors that reduce stress.
For Pets
Chamomile can be helpful for dogs and cats with mild digestive issues (such as gas or an upset stomach) and for calming mild anxiety. A cooled chamomile tea (plain, no sugar or caffeine) can be added to water or food in small amounts. It also has mild antiseptic properties, making a dilute chamomile rinse useful for minor skin irritations.
Caution: Chamomile belongs to the daisy family, so pets with allergies to ragweed or other daisy species may react. Stop use if you see swelling, hives, or breathing. Never use essential oils internally; only use dried flowers or tea.
CBD (Cannabidiol)

For Humans
CBD is a non-psychoactive compound from the hemp plant. Humans use it for chronic pain, anxiety, epilepsy, and inflammation. Research supports its safety and effectiveness for certain conditions, though regulation remains uneven.
For Pets
CBD is increasingly studied for dogs and cats. It appears helpful for:
- Anxiety: separation anxiety, noise phobias
- Pain: arthritis, chronic pain
- Seizures: in dogs with epilepsy
However, not all CBD products are safe for pets. Many human CBD oils contain THC (the psychoactive compound) or artificial flavorings (like chocolate) that are toxic. For pets, choose isolate or broad-spectrum CBD with zero THC, formulated specifically for animals. Dosing must be based on weight (typically 1–5 mg/kg, but consult a vet). Side effects can include drowsiness, dry mouth, or low blood pressure.
Milk Thistle

For Humans
Milk thistle is best known for liver support. The active compound, silymarin, is an antioxidant that helps protect liver cells from damage and may aid in regeneration. People use it for liver disease (like cirrhosis or hepatitis) or as a detox support after medication.
For Pets
Milk thistle is one of the few herbs widely accepted in veterinary integrative medicine for liver health. It is commonly prescribed for dogs and cats with:
- Liver disease or elevated liver enzymes
- Toxin exposure (e.g., certain medications or mold)
- As a supportive therapy during chemotherapy
Safety: Milk thistle is generally very safe for pets when given at the correct dose. However, it should not be used as a replacement for veterinary treatment if a serious liver condition is suspected. Also, because it can lower blood sugar, use caution in diabetic pets.
General Precautions for All Herbs
Before giving any herbal remedy to your pet, keep these rules in mind:
- Consult your veterinarian first. Some herbs can interfere with medications (like blood thinners or seizure drugs), and what is safe for humans may be toxic to cats (e.g., tea tree oil, garlic).
- Use pet-specific products. Human supplements often contain artificial sweeteners (xylitol) or other additives that are dangerous.
- Start low, go slow. Introduce a new herb at a fraction of the recommended dose and monitor for adverse reactions.
- Do not self-diagnose. A symptom like vomiting or anxiety could have an underlying medical cause that requires professional diagnosis.
The Bottom Line
Valerian root, chamomile, CBD, and milk th all offer overlapping benefits for humans and pets when used responsibly. Valerian and chamomile can calm nerves; CBD helps with pain, anxiety, and seizures; milk thistle supports liver function. But the “same” herb does not mean the same product or dose. Always rely on evidence-based veterinary guidance, and remember that your pet’s safety comes first. Nature can be a powerful ally—but only when we use it wisely.
Sources
[1] Merck Veterinary Manual — Flea Allergy Dermatitis.
[2] Cornell University — Atopic Dermatitis in Dogs.
[3] Today’s Veterinary Practice — Elimination Diet Trial guide.
[4] Dogs Inc — Ask the Vet: weekly oatmeal bathing for allergy itch.
