Biheldon vs Drontal — the honest UK comparison (2026)

Quick answer. Biheldon and Drontal Cat use the same active-ingredient combination — praziquantel + pyrantel embonate — for tapeworm, roundworm, and hookworm cover in cats and dogs. Drontal Dog Tasty Bone adds febantel for whipworm cover. Per-tablet UK prices in May 2026: Biheldon £0.50, Drontal Cat £2.51, Drontal Dog Tasty Bone £2.69. If your dog or cat doesn’t need whipworm cover (UK whipworm is uncommon in dogs and not a meaningful concern in cats), Biheldon is the same protection at one-fifth the price. If you need whipworm cover, Drontal Dog Tasty Bone or a fenbendazole product is the right choice.

Drontal is one of the most familiar wormer brands in the UK — it’s the one most vets sell across the counter, and it’s the product against which other broad-spectrum wormers tend to be compared. Biheldon is positioned as a value alternative to the Drontal range. This guide lays out exactly where the two overlap and where they differ — not from marketing material on either side, but from the NOAH Compendium datasheets and current UK retailer pricing.

The active ingredients

The Drontal range isn’t one product — it’s three formulations covering different pets. The active-ingredient comparison matters per-formulation.

What this means in practice:

• Biheldon and Drontal Cat are the same active-ingredient combination — praziquantel + pyrantel embonate. The strengths differ slightly (Biheldon has more praziquantel; Drontal Cat has more pyrantel embonate), but the parasites covered are the same.
• Drontal Dog Tasty Bone adds febantel to the praziquantel + pyrantel embonate base. Febantel is the active that extends coverage to Trichuris vulpis — whipworm.
• Biheldon does not contain febantel. It does not cover whipworm. This is the single most important difference for dog owners to understand before switching from a Drontal Dog product.

Parasites covered

Two things to call out from this table:

1. Neither Biheldon nor any Drontal product treats lungworm. This is a common misunderstanding — Drontal is “broad-spectrum” but the spectrum doesn’t include the parasite that needs the most active prevention in modern UK dogs. Lungworm needs a separate monthly product (Milbemax, Advocate). See our pillar guide on how often to worm a dog for the full picture.

2. Whipworm is uncommon in UK dogs, but possible — especially in dogs with regular access to contaminated soil (kennels, certain parks, multi-dog households where one animal has had a confirmed infection). If your vet has run a faecal egg count and identified Trichuris vulpis, you need a febantel- or fenbendazole-containing product. Biheldon alone won’t clear it.

UK regulatory class

Biheldon ships from inside the EU as an authorised veterinary medicine in its country of authorisation. UK-supplied Drontal products are classified NFA-VPS — they are non-prescription, but must be sold via a registered pharmacist or SQP (Suitably Qualified Person). The practical difference at the buyer’s end is the supply route, not the active ingredient or the dosing.

Price per tablet (verified May 2026)

These are typical UK online prices in May 2026 — high-street vet practice retail will usually run a further 30–60% above the online figure.

For a typical 20 kg adult dog wormed every 3 months (four doses per year, 2 tablets per dose), one year of cover costs:

• Biheldon: £4.00 (8 tablets × £0.50)
• Drontal Dog Tasty Bone: £21.52 (8 tablets × £2.69)
• Difference per dog per year: £17.52

Across a multi-pet household — two dogs and a cat — the annual difference becomes meaningful enough to justify the switch on price alone, provided your pets don’t have a clinical need for the whipworm cover Drontal Dog adds.

When Biheldon is the right choice

• Routine 3-monthly intestinal worming for adult dogs and cats with no history of whipworm, no lungworm-area risk, and no clinical indication for a specific alternative active
• Multi-pet households where the per-tablet price difference compounds across animals
• Breeders and rescues worming on a regular schedule for many animals
• Owners following ESCCAP UK guidance for more-than-3-monthly worming (hunting dogs, raw-fed dogs, families with young children) — where the more-frequent schedule becomes financially sustainable at the lower per-tablet price

When you should choose Drontal (or something else) instead

• Confirmed whipworm infection — choose Drontal Dog Tasty Bone (or Panacur / fenbendazole). Biheldon does not cover whipworm.
• You live in a lungworm-endemic area (most of south-east England, the midlands, south Wales, increasingly Scotland) — neither Biheldon nor Drontal is the right standalone product. You need Milbemax or Advocate on top of a 3-monthly intestinal wormer.
• You strongly prefer a UK supply chain for traceability — Drontal is UK-marketed by Vetoquinol with the full NFA-VPS supply chain, and that may matter to you personally. Biheldon imports from its EU country of authorisation; this is fully legal but is a different model.
• Your vet specifically prescribed Drontal for a clinical reason — always follow vet instructions over a generic switch.

When you should choose Milbemax instead of either

If you live in a lungworm-endemic UK region, Milbemax is the only product among Biheldon, Drontal, and Panacur with a UK lungworm licence. Owners in those regions usually end up running a monthly Milbemax (or Advocate / Bravecto Plus) for lungworm cover, and the 3-monthly intestinal wormer (Biheldon or Drontal) becomes redundant — Milbemax already includes praziquantel for tapeworm and milbemycin for roundworm/hookworm/whipworm.

See our best UK worming tablets guide for the full decision tree.

The bottom line

Biheldon and Drontal Cat are essentially the same product at very different prices — same actives, similar strengths, same parasites covered. Drontal Dog Tasty Bone adds febantel for whipworm cover, which matters in a small minority of UK dogs. For the majority of UK pet owners running standard 3-monthly worming, the active ingredients are the same and the price gap is roughly 5×. That gap is what makes the more-frequent schedule (which ESCCAP UK explicitly recommends for hunting, raw-fed, or kid-household dogs) financially realistic.

For owners who need whipworm cover or who live in a lungworm-endemic area, neither product is the right standalone — you need something different, and the brand question becomes irrelevant.

See Biheldon’s full active-ingredient detail, dosing chart, and contraindications on the product page, and our pillar guide on how often to worm a dog for ESCCAP-cited frequency recommendations by lifestyle.

Tags: #dogs#cats#drontal#comparison#commercial