Re.. parasite in puppy..?

the vet did take some stool samples and he said it was intestinal parasite. puppy throwed up twice after each meal n did diarrhea once after being fed. was asked to give puppy ORS solution every 30-45 mins. puppy still pees normally. but it looks tired. what should i do? i plan to bring him to the vet tomorrow to give it iv drips. what should i do now?