NOW Supplements, Green Black Walnut Wormwood Complex Liquid

The Verdict

Let me be clear about what this is before you click buy: this is not a dewormer in the conventional sense, and it’s not FDA-approved for veterinary use. What it is is a 2-fluid-ounce liquid herbal formula that hundreds of pet owners have used as part of a broader parasite-cleanse protocol. The question is whether it actually works — and who it’s right for.

What You Actually Get

The bottle is compact — 2 fluid ounces — but that’s roughly 120 drops. For a 20-pound dog, that’s a full month’s supply at the standard dose of 2 drops per 10 pounds of body weight, taken twice daily. The amber glass bottle with a glass dropper is solid; no leaks, no flimsy plastic. The liquid itself is a dark, concentrated extract combining three proven antiparasitic botanicals: green black walnut hulls, wormwood, and clove.

The math matters here. At roughly $15–18 per bottle, you’re looking at $0.50–0.60 per day for a medium-sized dog. That’s competitive with most chemical dewormers, but the real cost is the time commitment — this isn’t a one-and-done treatment.

Real-World Performance

Here’s where the reviews get interesting. The 220 ratings average out to 4.4 stars, and the pattern is consistent: owners who saw results were methodical about the protocol. One reviewer noted, “I gave this to my German Shepherd for 3 weeks straight with pumpkin seeds added to his food. The dead worms showed up in his stool by day 10.” Another wrote, “My vet confirmed the roundworm infection was gone after we finished the cycle.”

The herbal blend works synergistically: black walnut targets adult parasites, wormwood hits the larval stages, and clove attacks the eggs. That’s why the manufacturer recommends a 2–3 week cycle — you need to break the life cycle completely, not just kill the adults.

What Owners Consistently Praise

Three things come up repeatedly in positive reviews:

1. It actually works when used correctly. The success stories typically involve owners who also cleaned bedding, washed food bowls daily, and added fiber to their pet’s diet.
2. Gentler than chemical alternatives. Multiple reviewers mentioned their pets had zero side effects compared to prescription dewormers that caused vomiting or lethargy.
3. The dropper makes dosing manageable. The glass dropper is marked, and the liquid is thin enough to mix easily into wet food or broth.

Where It Falls Short

Let’s be honest about the downsides. First, taste. This stuff is intensely bitter — wormwood is one of the most bitter herbs on the planet. If you have a picky cat, you’ll likely end up wrestling with them twice daily. Several reviewers suggested mixing it with tuna juice or chicken broth; a few admitted defeat entirely.

Second, it’s not a quick fix. You’re committing to a multi-week protocol, and if your pet has a heavy parasite load, you may need multiple cycles. One reviewer wrote, “I expected this to work overnight. It took almost a month of consistent use, but it did work.”

Third, there’s no dosage guidance on the label for pets — you’ll need to calculate based on the human dosing instructions and your vet’s advice. This isn’t a product for first-time pet owners who want a simple solution.

Who Should Buy This

This is ideal for owners who prefer natural, holistic approaches and are willing to follow a structured protocol. It’s also great as a preventive maintenance tool if you’re in a high-parasite area or your pet is frequently outdoors. And if you have multiple pets, one bottle can cover a full course for two smaller animals.

Skip it if you need immediate results, have a pet with a severe infestation, or can’t commit to consistent twice-daily dosing for weeks. In those cases, see your vet for prescription options.

FAQ

Q: Can I use this on my kitten or puppy? A: The label doesn’t specify age limits, but the general guidance is for animals over 8 weeks. Always consult your vet first — young animals are more sensitive to parasite die-off reactions.

Q: How long until I see results? A: Most owners report seeing dead worms in stool within 7–14 days, but full clearance typically requires the complete 2–3 week cycle.

Q: Can I use this alongside regular deworming medication? A: Don’t stack treatments without veterinary approval. This formula is potent enough on its own when used correctly.

The Verdict

Buy it if: You’re committed to a natural parasite cleanse protocol, your pet is otherwise healthy, and you’re patient enough to follow the full cycle.

Skip it if: You need immediate results, have a difficult-to-medicate pet, or prefer the simplicity of a vet-prescribed chemical dewormer.

Rating: 4.2/5 — Effective for committed owners, but it demands consistency and patience. At this price point, it’s a reasonable first-line natural option, but it’s not a substitute for veterinary care in serious infestations.

Where to Buy

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.