Reaction to Strongid Wormer? - The Horse Forum
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post #1 of 6 Old 02-15-2010, 05:58 PM Thread Starter
Join Date: Sep 2009
Location: Western Mass
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Reaction to Strongid Wormer?

This is my first time owning a horse for more than a month [my last horse wasn't with us long]. We've had my horse for 5 months now, and on Saturday after I road him I gave him his grain, and came back three hours later with my mom and we gave him his wormer in the form of the Strongid injectable paste.
We waited a good half an hour to make sure he didn't have a severe reaction to it, and when he was happy in his stall, eating his hay and drinking him water, we left for the night.
Yesterday we were not able to get to the barn.
However, apparently last night when a girl in the barn went to give him his grain she noticed him laying down [which is really weird because he gets very perky and excited at dinner time] She went in his stall and made him get back up, and he went right back down, groaning. First thought, colic. Almost gave me a heart attack when I heard this.
Out of a very unfortunate communication glitch my mother did not receive ANY of the calls from the barn telling us what was happening, which is terrifying and therefore we put my number on the contact list also, my phone doesn't have problems like that.
According to the girl who was looking after him and trying to get a hold of us, the owner of the barn suggested to put him in a paddock for a while. When she went back out a few minutes later he was running around like a maniac, and when she put him back in his stall he was drinking water and eating hay.

We visited him today and that's when we learned of the calls that we did not receive. I took my horse out, groomed him, rode him around for a good hour, and he was fine, he pooped a good 4 or 5 times.

So thank god, it's not colic. Me and my mom are thinking he had a bad reaction to the wormer, but he's better now.

I'm wondering if anyone else had a similar experience with this worming medicine?
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post #2 of 6 Old 02-15-2010, 06:03 PM
Join Date: Dec 2009
Location: Iowa
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exercise can get things moving. He may have had bad gas. If my horse was down and no one could get a hold of me they better darn well be calling the vet. Also not sure about his previous worming schedule since you haven't had him long but if alot of worms die quickly they can get impacted.
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post #3 of 6 Old 02-15-2010, 06:08 PM Thread Starter
Join Date: Sep 2009
Location: Western Mass
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yes, another woman at the barn said that about worms dieing, so my mom thinks that he had some worms in him and they died, giving him a tummy ache.

The owner of the barn said they were caring for him, and he had gotten better when he was put in the paddock, but if he hadn't shown improvements she said she would've made desperate attempts to get a hold of us.

I guess he just improved so fast that they didn't have to call a vet.
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post #4 of 6 Old 02-16-2010, 10:47 AM
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It's possible that there was a parasite load that was dying off, however it's not very likely that quickly after pyrantel because of how long it would take it to even get well through the GI tract to even get to the worms. And then factor in that this isn't a drug that automatically kills worms but rather paralyzes them and then they come loose from the walls of the intestine and pass out the back of the horse.

This mild colic could have been caused by any number of things, but a parasite die-off and subsequent impaction is pretty low on the risk scale. Gas is more likely from the way he recovered with a bit of turnout.

Cindy D.
Licensed Veterinary Technician
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post #5 of 6 Old 02-16-2010, 11:24 AM
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^^ we had a horse in the hospital that colicked and died because of a mass die off and subsequent impaction. It was several days after worming and there was evidence in the feces that this is what was occurring. I would definitely check with your vet in the future to see if they recommend a different worming regiment, but agree that it was likely unrelated to worming.
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post #6 of 6 Old 02-16-2010, 12:35 PM
Join Date: Jul 2007
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Yep, days after deworming is more likely when you would see an impaction due to heavy parasite burden and deworming.

Cindy D.
Licensed Veterinary Technician
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