Use comes at a risk that has to be evaluated. I Would say don’t take the risk – French Bull dog 7 years old fit and healthy came down with severe vomiting and no interest in food. Went on for a week before we took him to vets, second visit anti sickness injection. vomiting subsided but still not much interest in food also booked in for a scan. As we was despairing with the state of our once chunky frenchie reduced to skin and bone we started backtracking on what he might of eaten or where he’s been. 2 weeks ago he was wormed and the vet changed his spot on flea to a tablet. This was the only variable over the last weeks so read the paperwork given with the tablets. All the symptoms and worse luckily we realised before we gave him the second. This medication should be banned, there is a much safer alternative so why run unnecessary risks. Hopefully he will pull through but it has knocked him for six. There is a petition to get this banned on the change website I will be signing I suggest others do the same. DO NOT USE THIS MEDICATION it’s a lottery.