Panacur side effects

Panacur is an anti-parasitic medicine used to remove worms from the gastrointestinal tract. Panacur is the trade name for the drug fenbendazole and is manufactured by Intervet-Scherring Plough.

The most common parasites it is used to treat in the gut and intestines are roundworms, hookworms, whipworms, and to a lesser extent, tapeworms. It can be given to many types of animals, including dogs, cats and farm livestock.


Panacur is available in powdered granules, oral liquid suspension, and in a paste. Household pets are normally given the granules or liquid, while farm animals are given the paste. The amount of Panacur given is determined by the weight of the animal.

Duration of treatment

Panacur is normally given for three days to the afflicted animal. A single dose will not usually be sufficient to eliminate all of the parasites. The powder can be mixed with food, while the paste and liquid are administered directly to the animal.

Common Side Effects

Panacur is a very safe drug and is difficult to overdose, but there are sometimes minor side effects. Vomiting is the most common side effect seen after administering Panacur. If this does happen, call your veterinarian before resuming treatment.

Secondary Diarrhea

Diarrhoea is sometimes reported by owners after giving Panacur to their pet. This is almost always due to the irritation that the worms themselves are causing in the gastrointestinal tract. If the diarrhoea becomes severe or is bloody, call your veterinarian at once.

Less Common Reactions

Some less common side effects of Panacur include heavy breathing, itching, swelling of face, and lethargy. If any of these become prominent, call your veterinarian for advice, or take your animal in for a quick check-up.