Yes, we use it.
My husband gives the shots and it's given in-between the shoulder blades into the skin not muscle as recommended by our vet (some do it IM). I hold treats while he gives the shot as it burns.
Our initial dose was one per week for 4 weeks (loading dose) and then once per month unless the vet has a different schedule.
Your vet or tech should be able to instruct you for this or if you don't have the stomach for it the vet tech should be able to give it to your dog for small fee or no charge since you are purchasing it from your clinic.