What is the problem with cats vomiting yellow water after taking deworming medication?

This is caused by the stimulation of the medication or incorrect feeding method. The medication stimulates the cat’s intestinal tract and causes disturbances in the cat’s intestinal flora, and some cats may experience vomiting, diarrhoea, indigestion and other symptoms. If your cat vomits, check to see if the medicine has been vomited out, and if it has, feed it again. Because cats are very resistant to taking medicine, the action should be quick, accurate and hard when feeding to avoid the cat accidentally biting the owner and to reduce the chance of the cat spitting up the medicine. If it is really difficult to feed the medication, crush it and mix it into the cat food.