Broad-spectrum wormer · for dogs & cats
The wormer your vet uses, without the vet markup.
Praziquantel 50 mg + pyrantel embonate 150 mg per scored tablet — the same active-ingredient combination as Drontal Cat, at roughly one-fifth of the per-tablet price. 30 tablets per box, dosed by body weight, dispatched from inside the EU.
EU-authorisedveterinary medicine
30 scored tabletssplittable for accurate dosing
Tracked shippingworldwide, from the EU
“Fantastic value, happy animals.” — Pipi, multi-pet household
Made in Europe
Praziquantel 50 mg
Pyrantel 150 mg
Scored tablets
ESCCAP-UK schedule
Drontal-analogue
Why it matters
Worm regularly, not when the budget allows.
Skipped doses are how worms come back. Biheldon's per-tablet price is low enough that families with several animals can keep to a real every-3-month schedule — the ESCCAP UK minimum.
£0.50 vs. £2.51
A fifth of the per-tablet price.
The same actives — praziquantel + pyrantel embonate — at a fraction of what the typical UK retail brand charges. For a household with four pets dosed every 3 months, that's the difference between worming and not.
Vet brand Drontal Cat
£2.51
per tablet
NFA-VPS, praziquantel 20 mg + pyrantel embonate 230 mg.
Biheldon 30-tablet box
£0.50
per tablet
Same active class. Same job. EU-authorised veterinary medicine.
You save per dose −80%
Be sure before you buy
Exactly what Biheldon does — and doesn't — cover.
A wormer that's honest about its limits is one you can plan around. Biheldon is a broad-spectrum intestinal wormer. It is not an all-in-one parasite product.
✓ Covers in one dose
Tapeworms, roundworms, and hookworms — the three parasite classes responsible for the vast majority of intestinal worm cases in pets.
- ✓ Tapeworms in dogs and cats (Dipylidium caninum, Taenia spp., Echinococcus granulosus, Echinococcus multilocularis)
- ✓ Roundworms in dogs and cats (Toxocara canis, Toxocara cati, Toxascaris leonina)
- ✓ Hookworms in dogs and cats (Ancylostoma, Uncinaria stenocephala)
! Does not cover
If your pet needs cover for these, pair Biheldon with a separate product. We'd rather tell you upfront than have you find out later.
- ✕ Lungworm (Angiostrongylus vasorum) Lungworm is now endemic across much of the UK. If you live in an at-risk area, you need a monthly prescription product containing milbemycin oxime (Milbemax) or moxidectin (Advocate) on top of a 3-monthly intestinal wormer. Ask your vet.
- ✕ Whipworm (Trichuris vulpis) Whipworm is uncommon in the UK but possible in dogs with regular access to contaminated soil. If your vet has identified whipworm on a faecal egg count, use a fenbendazole product (Panacur) or a febantel-containing combination (Drontal Tasty Bone for Dogs).
- ✕ Fleas, ticks, and mites Biheldon is a wormer only — it contains no insecticide. Use a separate flea/tick product (e.g. a spot-on or oral isoxazoline). For households that want one product for both, ask your vet about Broadline (cats) or NexGard Spectra / Bravecto Plus (dogs).
How it works
Three steps. Every three months.
Adult dogs and cats follow the same simple rhythm. Tablets are scored — so you split, not estimate.
01
Weigh
Weigh your pet.
1 tablet per 10 kg of body weight. Scored on both sides for accurate halves and quarters down to 2.5 kg.
02
Give
Give the dose.
Directly into the mouth, or mixed into a meal. Both active ingredients start absorbing within 30 minutes.
03
Repeat
Repeat every 3 months.
The ESCCAP UK minimum for adult pets. More often for puppies, kittens, hunters, and raw-fed dogs.
Dosing by weight
One tablet per 10 kg. No guesswork.
Tablets are scored on both sides for clean halves and quarters. Maximum 4 tablets per animal per dose.
- 1 tablet per 10 kg (22 lb) of body weight. Do not exceed 4 tablets per animal.
- Adult dogs and cats: every 3 months.
- Puppies: from 4 weeks of age, every 2 weeks until 12 weeks old.
- Kittens: from 1.5 lb (around 6–8 weeks old), then every 3 months.
- Can be given directly or mixed with food.
| Body weight | Dose |
|---|---|
| Up to 2.5 kg (5.5 lb) | ¼ tablet |
| 2.6 – 5 kg (5.7 – 11 lb) | ½ tablet |
| 5.1 – 10 kg (11.24 – 22 lb) | 1 tablet |
| 10.1 – 20 kg (22.27 – 44 lb) | 2 tablets |
| 20.1 – 25 kg (44.31 – 55 lb) | 2½ tablets |
| 25.1 – 30 kg (56 – 66 lb) | 3 tablets |
| 30.1 – 40 kg (67 – 87 lb) | 3½ tablets |
| 40.1 – 50 kg (88.4 – 110 lb) | 4 tablets |
Side by side
How Biheldon compares honestly.
Different wormers do different jobs. Here's where Biheldon wins on price, and where another product is the right call.
| Product | Actives | Round | Hook | Tape | Whip | Lung | UK Class | £ / tablet |
|---|---|---|---|---|---|---|---|---|
| Biheldon us | praziquantel 50 mg + pyrantel embonate 150 mg | ✓ | ✓ | ✓ | ✕ | ✕ | Imported veterinary medicine | £0.50 |
| Drontal Cat | praziquantel 20 mg + pyrantel embonate 230 mg | ✓ | ~ | ✓ | — | ✕ | NFA-VPS | £2.51 |
| Drontal Dog Tasty Bone | febantel 150 + pyrantel embonate 144 + praziquantel 50 | ✓ | ✓ | ✓ | ✓ | ✕ | NFA-VPS | £2.69 |
| Milbemax (Dog, 5–25 kg) | milbemycin oxime 12.5 mg + praziquantel 125 mg | ✓ | ✓ | ✓ | ✓ | ✓ | POM-V | £4.26+ |
| Panacur (fenbendazole) | fenbendazole only | ✓ | ✓ | ~ | ✓ | ~ | NFA-VPS | sold by sachet |
✓ covers · ~ partial · ✕ not covered · — n/a. UK retail prices sourced from NOAH Compendium datasheets.
Real customers · real households
Stories from multi-pet homes.
Now you can afford to worm your dog and cat regularly. I am so glad I decided to look for wormers on the net. The wormers from the vet were so expensive at £3 per tablet and I have four animals to worm. Since I am now able to buy these Biheldon wormers — broad-spectrum, killing a wide range of worms and their eggs — my animals are getting treated regularly. My cat was eating three small tins of food a day; she is back on one tin daily and is not continually yowling for more food. My dogs are glossy coated and not coughing anymore. Seems like they work pretty good to me. Fantastic value, happy animals, and great protection against worms.
Pipi
Verified buyer
Good job that men or women with more than one dog can affordably treat their dogs. Too many medical requirements for dogs are prescription-only, meaning you've to attend veterinary surgeries and pay ridiculous and unrealistic prices for dog treatments.
Andy
Verified buyer Have used this product in the past and it's excellent — also very good value for the price. Have used it on three dogs including a puppy, and none of them have had upset stomachs or sickness from them.
Nick
Verified buyer Seems very good value — a fraction of what local vet suppliers rip people off for.
J. Owen
Verified buyer The product is excellent and keeps my dogs worm-free. I would absolutely recommend this product to anyone who has dogs or cats.
Rachel
Verified buyer Does what it says and worms your pet. I've used this product for three years in my breeding kennels.
Monique
Verified buyer In the box
30 scored tablets. Months of cover.
Three blister packs of ten in a carton box, all manufactured in the European Union. Enough for ~12 months of every-3-month worming on a 20–30 kg dog, or ~30 doses for a single cat.
- Praziquantel 50 mg + pyrantel embonate 150 mg per scored tablet
- 3 blisters × 10 tablets per carton
- Splittable for accurate dosing on smaller pets
- Authorised veterinary medicine manufactured in the EU
Authorised vet medicine · EU FAQ
Common questions, answered honestly.
Does Biheldon treat fleas?
No. Biheldon is an intestinal wormer only — it contains no insecticide. To treat fleas you need a separate product, typically a spot-on (Frontline, Advantage) or an oral isoxazoline (NexGard, Bravecto). You can use a flea product and Biheldon on the same day for most pets, but stagger by 24 hours if your pet has a history of sensitivity to either.
Does Biheldon cover lungworm?
No. Lungworm (Angiostrongylus vasorum) is transmitted by slugs and snails and is now endemic across much of the UK. Treating lungworm requires a prescription product containing milbemycin oxime (Milbemax) or moxidectin (Advocate, Bravecto Plus), given monthly in at-risk areas. If you suspect lungworm — persistent cough, breathing difficulty, unexplained bleeding, lethargy — see a vet immediately.
Can I worm a pregnant or lactating dog or cat with Biheldon?
Consult your vet first. Both praziquantel and pyrantel embonate have a good safety record in pregnant and lactating animals (pyrantel embonate is poorly absorbed; praziquantel is FDA category B in humans). However, dosing during pregnancy is a clinical judgement and depends on stage of pregnancy, other medications, and your vet's protocol. Do not self-medicate a pregnant pet.
How long does Biheldon take to work?
Praziquantel acts within hours — it causes near-instantaneous paralysis of tapeworms on contact, and dead worm segments are typically passed in the stool within 24–48 hours. Pyrantel embonate paralyses roundworms and hookworms within the same window, and worms are then expelled by normal gut peristalsis. You may not see worms in the stool at all if the parasite load was low — that is normal and does not mean the treatment failed.
Is Biheldon a prescription medicine in the UK?
No. Biheldon is imported as an EU-authorised veterinary medicine and supplied directly to pet owners — no UK vet prescription is required for purchase. The active ingredients (praziquantel and pyrantel embonate) are themselves NFA-VPS class in the UK supply chain when sold by domestic brands like Drontal Cat.
What if my dog or cat vomits within an hour of the tablet?
Re-dose with the same amount, ideally with a small amount of food. Both active ingredients begin to be absorbed within 30 minutes, but a tablet that comes back up whole or partially dissolved is unlikely to have delivered a full dose. If vomiting persists beyond the first dose, stop and contact a vet — persistent vomiting is rarely caused by the wormer itself and usually points to a separate issue.
Are there any side effects?
Both active ingredients have a high safety margin. Reported side effects are rare and almost always mild and transient: occasional GI upset (soft stools, mild nausea, reduced appetite) for 12–24 hours after dosing. Serious side effects are very uncommon. If your pet shows any unusual behaviour, lethargy, persistent vomiting, or signs of an allergic reaction (facial swelling, hives, difficulty breathing) after taking Biheldon, stop further dosing and contact your vet.
Can I split a tablet for a smaller pet?
Yes. Biheldon tablets are scored on both sides so they can be split into halves or quarters for accurate dosing of pets under 10 kg. See the dosing table for the exact split by body weight. Split tablets can be stored in the blister pack for the next dose, ideally used within 28 days.
Is Biheldon safe for puppies and kittens?
Puppies from 4 weeks of age (and weighing enough for at least a quarter-tablet) can use Biheldon. The puppy schedule is every 2 weeks until 12 weeks old, then every 3 months. Kittens can use Biheldon from approximately 6–8 weeks of age, once they reach ~1.5 lb (700 g) body weight. Do not use earlier than this — both products are licensed from these ages in their UK equivalents (Drontal Cat, Drontal Puppy Suspension).
How often should I worm my pet?
ESCCAP UK recommends a minimum of four times a year (every 3 months) for adult dogs and cats with outdoor access. Push to every 2 months — or monthly — if your pet hunts, eats raw food, lives with young children or anyone immunocompromised, or you live in a high-Echinococcus area (parts of Wales, Hebrides). Puppies and kittens need worming more often during their first 12 weeks of life.
Ready when you are
Worm your pets without the vet markup.
Order today and your box ships tracked, internationally, dosed by your pet's body weight. EU-authorised, manufactured in Europe, dispatched in 1–2 business days.
✓ Tracked shipping ✓ 30-day returns ✓ Secure checkout via PayPal
Biheldon Wormer
1 box · 30 tablets
Praziquantel 50 mg + pyrantel embonate 150 mg per scored tablet
Quantity
1
Total
£14.99
Shipping
30 tablets · + £4.99 shipping
Buy now → £14.99