Seditive / tranquilizer same thing. It should not be used for running barrels. You'd be surprised of some vets who hand it out like candy to anyone who asks. 

I just wanted to add to this, I also have an extreme anxiety horse. He is now 9, probably only gotten worse with age. He literally trembles over things like trees, his own shadow, literally anything (half the arena is covered by trees). He's been at this barn for years, but cannot seem to get over himself with anything. I can't hardly get anything done riding. He shakes and will blow up-he can run completely sideways, I call him a sidewinder. He will also get worked into a foamy-full sweat instantly from just being freaked out.

He's been on magnesium, calming supps, consistent riding schedules, turned out to pasture, hay change, buddy horse. I've tried so many things & this horse just does not get over himself. I'm nervous myself to try & haul him anywhere.  I feel the original poster's pain & I also wish I knew how to help. 

You would love my local vet.??

Ccarp18. Have you treated him for EPM? 

No, I have not! I'll have to look into it & ask my vet

Who is the girl who sells the THE products? I need some, but I can't remember who she is. I want to buy from her because she is great at shipping fast and is so knowledgeable and nice. 

Thats Wyoming barrel racer (Krystal Peterson) GrazingbitPreformancenorses.com or 307 Quarter Horses, this is her new set up/web site.

What is your horses total diet?

He colicked and since he has had to be on a very limited diet I know he is developing ulcers, plus we ran out of their colic relief which works wonders. His diet is Timothy pellets and grass hay and pasture. However, we have a horse that has to be stalled and the other 3 horses have been taking turns babysitting every 12 hours. He had to babysit for longer though, and I think that's why he colicked. He is doing fine now.  This is horse that's not being ridden right now. 

Anyone use Guanabenz?  If so IV/IM/oral?  Did you get results.  Anyone have an alternative to it that worked well?

I do. I give .6-.8 cc at least 90 minutes out. I don't like using it, but it works. 

I agree on guanabenze. Also Chloraprozine liquid works great. 1.5 cc orally 45 min before a run. I warm him up first and then give it to him. Do 5 min or so of long trotting and loping some cirlces and then a make a run. Great for his anxiety.

This has really worrked well for my friend that literally could not ride the horse at home and best resutls with the powder especially since the horse in question hates neddles.