Originally Posted by specialdelivery
will it cause any other adverse reactions if neckthread worms is not the culprit
I would worry if the horse is prone to colic or ulcers, has some sort of drug sensitivity, or is ver young.
But, I have the Arab, mentioned above, with gastric ulcers and a TWH with equine metabolic syndrome and hind gut ulcers.
The Arab was 25 and the TWH 23 at the time I double-dosed them and they didn't suffer any ill effects.
I literally dosed them as I was turning them out to pasture that morning. They have a lot of pasture to keep moving on. I watched them all day and they were fine
The TWH got two full tubes, the Arab got dosed at 1,800 lbs as he only weighs 840 lbs.
If you decide to try it, be sure to buy pure
Ivermectin, don't buy anything that has something added to the Ivermectin. Ivermectin is supposed to be the safest "of them all" Parasite Information - Neck Threadworms
There's a 700 page discussion about this on the COTH forum. I read that thread for two years before I finally got up the nerve to double-dose three of my four horses that were exhibiting the symptoms of NTW's.
If you're not dealing with neck threadworms, you have just successfully wormed your horse for Spring and your horse should not suffer any harm.
As with anything, there's always that one in a thousand that something could happen.
The TWH I double-dosed suffered no ill-effects yet five grams of bute (half tablet) will literally drop him to the ground. The vet had to stay 30 minutes extra after he got his rabies shot to be sure his hooves stayed firmly on the ground; he did have a reaction but not too serious.
I once had a horse that was so allergic to fly spray with Skin-So-Soft in it, she cost me a vet bill.
Meaning, 999 horses out of 1,000 can safely be double-dosed for thread worms. After two years of hesitatig, I took the chance because I was not having long-term success with topicals; my Arab's belly line looked like an advertisement for diaper rash cream as soon as the midge flies came out in the Spring.