I remember this injection being very popular when I lived in Portsmouth. I personally have never used it, I always use Frontline. But talking about new things. I was amazed when I asked for Drontal at the vets for Degas & Foxy. Instead they just squirted some liquid on the back of their necks and said all done!!!! I was amazed it was soo easy. But a word of warning for anyone who is going to shows. When Degas had it, it left like a greasy stain on his coat for around 3 days. It has disappeared, but I would have been really stuck if he had been entered in a show