I use a 20g 1". You can use the same needle for drawing up and injecting, but if you have a horse that is iffy about needles you may want to change needles. Piercing the rubber stopper does dull the need somewhat and sharper needle=more comfortable injection. If I'm giving Adequan to a sensitive or needle shy horse I usually change needles.
I buy the needles used for insulin injections because they are finer. I figure if they are good for humans to use daily, they are good for use on my horses.
And you can draw Adequan up through a 28 g (or smaller) insulin needle? Really? And how on earth did you find a length that was appropriate--aren't they all like 1/2"? At that length, you're barely delivering the dose IM in a horse...more like sub q (which is what they're actually designed to do, right?) I didn't even know they made needles that small with hubs that would attach to a regular syringe.
Am I just misremembering that Adequan is really pretty viscous stuff? Granted it's been awhile since I've given it, but I do not recall it as something I would try with an insulin needle.
There's no way you can do an IM injection on a HORSE with an insulin syringe designed for sub-q. No. Way.
The longest are 1/2". There are also "shorts" at 5/16". Given how fine they are (31 gauge) and at those two lengths, don't get insulin syringes for am IM horse injection. They are meant to pierce human skin and go only as deep as fat.
I don't know what the dosage of Adequan is but it would have to be less than 1cc to use an insulin syringe.
Alright, glad I'm not the only only a little incredulous about the insulin needle comment. Thinking back, I've used 25 g 1/2" needles on a 1 cc syringe to give sub q to a cat. If I wasn't careful, I had trouble even getting the needle through the STOPPER. I cannot even fathom using something smaller to give adequan to a horse.
Thank you very much everyone. This has been very helpful. I have lots of 18 and 20 needles on hand. I will use the 18 to draw up and the 20 1.5 to inject. I am getting old and forgetful. Can't remember what I used last year. I have always injected in the neck but since I have to give 7 injections 4 days apart I may use both sides of the neck and pecs. He can't stand a bug landing near his hind end so it may not be a good location for injecting.