Panacur Powerpac Fenbendazole Paste Wormer 5-Dose

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Panacur Powerpac Fenbendazole Paste Wormer 5-Dose


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Shipping weight = 1.50 lbs.



Product Summary:

Panacur® POWERPAC Paste Wormer

Safe for all ages and breeds of horses, the Panacur® POWERPAC of five syringes offers a complete course of treatment for a 1250-pound horse in convenient, oral administration, with a unique apple-cinnamon flavor that is highly palatable. The broad coverage in this incredible wormer is even safe for 5-day regiment needs for those horses with severe worm issues or those that are sensitive to wormers. You will see coat results in a few short days after treatment.

Panacur® has a high degree of efficacy against all stages of encysted (hypobiotic) small strongyles. It is an approved method of larvicidal treatment for encysted EL3s and L3/L4s, 98% effective in killing hypobiotic encysted EL3s, 96% effective against L3/L4s, and highly effective against the predominant internal parasites of horses: large strongyles, small strongyles (encysted early third stage cyathostomes), late third stage and fourth stage mucosal cyathostome larvae, pinworms, ascarids and arteritis caused by fourth stage larvae of strongylus vulgaris in horses.

Note: This item is not available to ship to Canada.


  • Safe for foals and pregnant mares, older horses, thin and underweight horses, miniature horses, the environment and for use around other farm animals and pets
  • Labeled for the control of large and small strongyles (including migrating larvae), pinworms and ascarids (roundworms)
  • The only FDA-approved treatment for all stages of encysted small strongyles
  • Widely recognized as the product of choice for treating ascarids in young horses
  • May be effective even in the face of prior fenbendazole resistance when used as part of a strategically designed anthelmintic program
  • Antiparasitic action is due to the inhibition of energy metabolism in the parasite
Item Specifications:

57g syringes (5 per carton)

10% (100mg/g) fenbendazole paste

Administration and Dosage:
Panacur (fenbendazole) Paste 10% is administered orally at a rate of 2.3mg/lb (5mg/kg) for the control of large strongyles, small strongyles, and pinworms. One syringe will deworm two 1,250 lb. horses. For foals and weanlings (less than 18 months of age) where ascarids are a common problem, the recommended dose is 4.6mg/lb (10mg/kg); one syringe will deworm one 1,250 lb. horse.
For control of encysted early third stage (hypobiotic), late third stage and fourth stage cyathostome larvae, and fourth stage larvae of Strongylus vulgaris, the recommended dose is 4.6mg/lb (10mg/kg) for five consecutive days; administer one syringe for each 1,250 lb. of body weight per day.
Use in all newly arrived horses and then once or twice per year. Consult your veterinarian for assistance in the diagnosis, treatment and control of parasitism.

Do not use in horses intended for human consumption. When using Panacur (fenbendazole) Paste 10% concomitantly with trichlorfon, refer to the manufacturer’s labels for use and cautions for trichlorfon.

Downloadable Resources
Manufacturer InformationProduct Information
Item Number Model Number UPC
SLT790107 017754 021784471572
Additional Information:

Product Reviews by Customers

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Browse 19 questions Browse 19 questions and 92 answers
Why did you choose this? Store
To keep my horse healty
Sue E on Dec 9, 2018
Panacur Powerpac is a must! Keeps our horses healthy and parasite free! Love this wormer!
BROOKE S on Feb 27, 2018
To keep my horse healty
Sue E on Dec 9, 2018
Vet recommended
Nancy L on Oct 14, 2018
Panacur Powerpac is a must! Keeps our horses healthy and parasite free! Love this wormer!
BROOKE S on Feb 27, 2018
I have an incoming horse that needs heavy duty worming before I will allow it on my pastures.
Sally H on May 17, 2017
Most effective means to treat all Strongyle stages in horses.
Cherie P on May 11, 2017
Used many great.
Cindy S on Apr 19, 2017
I have a horse a little under weight. It's been really wet here in SE Texas, and want to make sure parasites are not the issue.
SYLVIA G on Mar 15, 2017
Recommended by DVM DO for worming aneurysm protocol
DORIE LU S on Sep 19, 2016
Vet recommended.
Sharon B on Aug 25, 2016
works great for unthrifty horses and for stubborn skin problems (migrating larvae)
Roberta J on Aug 11, 2016
I have 36 horses that need to be dewormed.
Jillian S on Jul 2, 2016
Bought this then didn't need to use it as the fecal count for my gelding has been 0 for the last two tests. Good to know I don't have to zap his system with these dewormers merely through good pasture management.
Fiona C on Jun 13, 2016
its part of an L4 deworming protocol from my osteopathy
Dawn W on Apr 5, 2016
it is the most economal
donald l on Feb 13, 2016
vet recommended.
robert on Jan 30, 2016
Works good.
corinne b on Dec 20, 2015
great price and very good product thanks
DAVID S on Nov 14, 2015
Economical price compared to other sites. I used this product to ensure my gelding was on the right track with his worming schedule when I bought him.
Rebecca S on Sep 21, 2015
Great, effective wormer.
Georgia L on Sep 18, 2015
it works good.
larry s on Sep 9, 2015
needed a horse wormer
GAYLE L on Sep 5, 2015
vet recommended for 3 year old who has colic'd twice in two weeks
Lori C on Aug 3, 2015
Excellent annual treatment to kill the parasites that become resistant to other workers.
SHARON J on Aug 2, 2015
power dose for my horses
Corinna A on Jul 22, 2015
Vet recommended.
Shalette D on Jun 26, 2015
Veterinarian's suggestion.
CATHLEEN S on Jun 19, 2015
vet recommended along with Quest plus and Quest for resistant worm anneuryms
KATHY G on Jun 15, 2015
Vet suggested we give this once a year
MOLLY M on Jun 11, 2015
Heard good reviews about helping a thin horse with questionable worming history
SARA W on Jun 8, 2015
Hope it helps my older mare.
Susan M on May 21, 2015
excellent results for integration of new horses in present herd to prevent spread of parasites
KAREN R on Apr 5, 2015
Best price
DAVID S on Apr 3, 2015
This is the wormer I use in Sept/Oct. I have 3 horse and 1 draft so I need all 5 each time I worm.
carrie s on Feb 28, 2015
Use it annually. Have for years.
LAURIE V on Feb 1, 2015
Used this product for the last 5 years and it helped my horses'health when coupled with Zimectrin Gold. Give it in Nov. and again in the spring.
Diane v on Jan 26, 2015
a good product to use annually
MARY C on Jan 21, 2015
vet suggested
Jill M on Jan 2, 2015
It works. The horses come out in the spring with beautiful coats and healthy condition.
MARY B on Dec 28, 2014
good product
Loretta H on Nov 20, 2014
recommended by our vet
Noreen M on Sep 2, 2014
Great price
SALLY T on Aug 29, 2014
For my colt - gets the crud out!
Nancy B on Jun 19, 2014
Recommended by a friend
Amber T on May 19, 2014
Vet recomended
KATHY W on May 16, 2014
Proper deworming is crucial to our rehabilitation of starvation/neglect cases. We appreciate the low prices at <a href="" target="_blank"></a> on this necessary product.
L.E.A.R.N. S on May 11, 2014
I have worms.
CAROLYN M on Mar 21, 2014
This is the best power-wormer available for horses!
Angela S on Mar 10, 2014
Vet recommended
Nancy L on Oct 14, 2018
I have an incoming horse that needs heavy duty worming before I will allow it on my pastures.
Sally H on May 17, 2017
I have a heavily strongyl count vet said poerpack.1100 lb I dose for 2200 lbs?
Shannon s on Jun 14, 2019
BEST ANSWER: Hi Shannon. We recommend speaking with your veterinarian to ensure the safety of your horse.
Yes Do I deworm any other time of the year if I use this power pack?
Cheryl P on Mar 18, 2019
BEST ANSWER: The fenbendazole is given march/ April and November/ December.
Are the tube sizes larger in the powerpack than in the single dose tube?
Kim S on Jun 5, 2018
BEST ANSWER: The power pack syringe is a 5 doze, the single is only a 1 doze.
A shopper on Feb 11, 2018
BEST ANSWER: if i remember correctly....administer one full syringe for 5 days in a row. one syringe treats up to 1250 pound horse. i had two ponies that were both about 600 pounds .... so i used a 1/2 of a syringe for each for the 5 days.
Would this product be effective if 1 syringe were given every 3 months as a rotational wormer? It seems to treat more types of worms than other wormers.
Bonnie S on Feb 2, 2018
BEST ANSWER: The Panacur is given in Mar/april and Sept/oct. in the rotational cycle.
Cathy M on Jan 20, 2018
BEST ANSWER: This info is also listed under item in product summary downloadable info
Panacur® (fenbendazole) Paste 10% is administered orally at a rate of 2.3 mg/lb (5 mg/kg) for the control of large strongyles, small strongyles, and pinworms. One syringe will deworm two 1,250 lb horses. For foals and weanlings (less than 18 months of age) where ascarids are a common problem, the recommended dose is 4.6 mg/lb (10 mg/kg); one syringe will deworm one 1,250 lb horse.
Directions For Use
1. Determine the weight of the horse.
2. Remove syringe tip.
3. Turn the dial ring until the edge of the ring nearest the tip lines up with zero.
4. Depress plunger to advance paste to tip.
5. Now set the dial ring at the graduation nearest the weight of the horse (do not underdose).
6. Horse’s mouth must be free of food.
7. Insert nozzle of syringe through the interdental space and deposit the paste on the back of the tongue by depressing the plunger.
Can this be given to a mare that is nursing?
ruth j on Sep 19, 2017
BEST ANSWER: This product has been tested safe for pregnant mares but there is no information available about nursing mares. We have to recommend that you check with your veterinarian, who will be familiar with your horse's entire health picture.
I have a broodmare approx 60 days into gestation that looks wormy...can I give her a power pack and if so just one treatment or can I do the full 5 days?
Jordan H on Aug 9, 2017
BEST ANSWER: This is a question for your veterinarian
Many of these questions seem most appropriate for a vet to respond. I have read the package and would seriously consider consulting with a vet. This is a multi day treatment for specific issues. Not just some Willy Billy Oh I think I'LL try this today. It's a great product and it works well in it's proper application. My question: is spring time or summer the most effective time to use this product?
A shopper on May 3, 2017
BEST ANSWER: Unfortunately the real answer is, "it depends." If for use on newly arrived horses, the time of year is not usually a consideration. For long-term residents, we have to recommend (as always) to check with your veterinarian. Alternatively, you can have a fecal test done ahead of time to best target for effectiveness.
I have a horse that weighs around 1100 pounds. Just so I am reading this correct, he would get almost the whole tube for 5 days?
Chelsea N on Mar 9, 2017
BEST ANSWER: Yes, that is correct. My vet told me to get this wormer for the type worms my horse had & it worked great.
Does each box have 5 syringes to treat a 2500lb horse? I have a 1500lb horse and a 500lb pony to treat so I'm wondering if I'd just need to get 1 box. Thank you.
Melissa B on Sep 26, 2016
each syringe contains enough wormer for a 1250 lb. horse.
so you would actually need to worm your 1500 lb. horse with:
1 1250 lb. syringe as well 250 lbs of an additional tube.
this must be done for 5 consecutive days.
your 500 lb. pony would need a 500 lb.
treatment for 5 days as well.
you would need to make sure that the second box has enough to cover the extra 250 lbs for 5 days plus the 500 lbs for 5 days.
hope this helps :)
i accidentally gave a whole tube of panacur power pac to my Tennessee Walker.(1100 lbs).Will he be ok.What should I look for?
Jim Cipp on Apr 25, 2016
BEST ANSWER: When you say a whole tube, I assume you mean one full syringe set to treat 2500 lbs of horse (not all 5 syringes in the power pac). I am not a vet, but as part of a 5 day larvacidal treatment, one whole tube per day prescribed, so even if you weren't meaning to give him/her the full tube I don't see why there would be adverse effects. If you're worried, read the fine print on the packing slip of the box, it tells you how they've tested it on mares in foal and horses several days in a row and what the effects were. (To my recollection there were not serious effects)
I know how you feel. I accidentally dosed my then 3 month old, 250 lb filly with a full tube of ivermectin meant for 1200 lbs. I was sweating bullets for the next hour as we looked up info. I kept a close eye on her over the next 24 hours and there were no effects at all. Phew!
Hope this helps :)
Can I do the power pack on 7 month olds?
A shopper on Feb 16, 2016
BEST ANSWER: No, they should be at least one year before doing a Powerpac regime on them. Also you are not supposed to use the 5 day program more than one time per year. You can use the Powerpac one time as a double dose, or the foal rate.
Can I give this to a stallion?
A shopper on Feb 15, 2016
Is it safe four yearlings or younger?
A shopper on Feb 15, 2016
BEST ANSWER: No, at least one full year to be safe. Use it one time only at the foal rate.
does panacur powerpac eliminate strongyles?
A shopper on Jan 15, 2016
BEST ANSWER: Eliminates large and small strongyles
I have a mini horse that weighs about 200 lbs and was told to give her a power pac. In looking at the package I would only need one suringe.Can I just use the regular single dose anddouble it for 5 days . Will it be safe and have the same effect??
A shopper on Feb 15, 2015
BEST ANSWER: The power pac is one dose a day for five days straight. Call the manufacturer for dose amount and make sure you give your little mini probiotics days before, during and a for a few days after your worming. I give my big horse a power pac one syringe a day. I called the makers and they told me the exact dose and date to worm. You have to time the worming right. It does make a difference!
Is this product safe for pregnant mares?
bnsranch on Oct 31, 2014
BEST ANSWER: I checked with my vet who specializes in equine reproduction and he said it was fine. I have used it several years after the first hard freeze on my pregnant mares with no ill effects