Brand: Tasty Allwormer for Dogs

Company: PURINA

FORMULATION: «tablets» for oral administration; may be chewable, flavored, coated, etc.


    • for small dogs & puppies: 112.5 mg/tablet
    • for large dogs: 225 mg/tablet
    • for small dogs & puppies: 25 mg/tablet
    • for large dogs: 50 mg/tablet

CHEMICAL CLASS of the active ingredient(s):


PARASITES CONTROLLED* (spectrum of activity):


  • Small dogs & puppies: 1 tablet for small dogs per 5 kg bw (equivalent to 22.5 mg/kg oxibendazole, 5 mg/kg praziquantel)
  • Larger dogs: 1 tablet for dogs per 10 kg bw (equivalent to 22.5 mg/kg oxibendazole, 5 mg/kg praziquantel)

* Can be slightly different in some countries: read the product label!


  • LD50 (acute oral) in rats: n.a. for the tablets. >10000 mg/kg for oxibendazole; 2840 mg/kg for praziquantel
  • Estimated Hazard Class according to the WHO: not applicable for veterinary medicines

Suspected poisoning? Read the articles on oxibendazole safety and/or praziquantel safety in this site.

You may be interested in the following articles in this site dealing with the general safety of veterinary products:


Risk of resistance development? VERY LOW

There are so far no reports on resistance of roundworms to oxibendazole or of tapeworms to praziquantel in cats.

Learn more about resistance and how it develops.


Are the active ingredients of this product ORIGINAL* or GENERICS**?

  • Oxibendazole: GENERIC (introduced in the 1970s)
  • Praziquantel: GENERIC (introduced in the 1970s)

*Meaning that they are still patent protected and generics are not yet available
**Meaning that they have lost patent protection and may be acquired from manufacturers of generic active ingredients other than the holder of the original patent.

COUNTRIES where this product is marketed: AUSTRALIA
GENERIC BRANDS available? YES, in some countries.

Click here to learn more about GENERIC vs. ORIGINAL drugs.


Tasty Allwormer for Dogs from PURINA is a generic wormer effective against roundworms and tapeworms

Oxibendazole is a veteran benzimidazole introduced in the 1970s (by SMITH KLINE → PFIZER→ ZOETIS) that is rather scarcely used in pets, horses or ruminants. It is a broad-spectrum anthelmintic effective against roundworms in the gut and the lungs, but not against those in the skin. It has no efficacy whatsoever against external parasites. It is scarcely to moderately used in pets and horses. Usage is insignificant in livestock. It is not used in agriculture.

Praziquantel is another veteran isoquinoline anthelmintic introduced in the 1970s (by BAYER). It is still the most effective and most vastly used parasiticide against tapeworms, but without any efficacy against roundworms, fleas or ticks. Praziquantel adds efficacy against tapeworms (Dipylidium caninumTaenia spp, etc.) but has no efficacy whatsoever against roundworms, hookworms or whipworms. It is the anthelmintic most vastly used against tapeworms in pets and horses. There are hundreds of antiparasitic brands for pets & horses containing praziquantel. Usage in livestock is rather modest. It is not used in agriculture.

Oxibendazole and praziquantel have no residual effect, i.e. they act against the worms during a few hours after administration but are quickly metabolized and excreted. For this reason treatment must often be repeated for certain indications.

For an overview and a list of the most popular pet wormers click here.


This article IS NOT A PRODUCT LABEL. It offers complementary information that may be useful to veterinary professionals and users that are not familiar with veterinary antiparasitics. 

Information offered in this article has been extracted from publications issued by manufacturers, government agencies (e.g. EMEA, FDA, USDA, etc.) or in the scientific literature. No guarantee is given on its accuracy, integrity, sufficiency, actuality and opportunity, and any liability is denied. Read the site's DISCLAIMER.

In case of doubt contact the manufacturer or a veterinary professional.