Any mammas ever deworm your kitten and he starts throwing up the next 2 days . Won't eat his food…

Any mammas ever deworm your kitten and he starts throwing up the next 2 days . Won't eat his food and drinks water a little bit? He's still very active and playful but he refuses to eat his food and keeps throwing up maybe once or twice the last 2 days. I stopped the medication and over vet is closed.