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Updated on September 23rd, 2025
Pet's info: Cat | Domestic Shorthair | Male | neutered | 15 lbs
Gave my 15 lb cat Elanco dewormer for tapeworms...1 and half tablets. Have seen two small worms by anus. He vomited within a half hour a 5-6" tapeworm. Should I give him additional tablets since he barely absorbed them? The tapeworm must have migrated to his stomach? He eats mice and rodents
3 Answers

Answered By Dr. Melanie, BVSc MS
Veterinarian
Published on July 26th, 2022
Answered By Dr. Melanie, BVSc MS
Veterinarian
Published on January 9th, 2018
If your cats didn't eat all the food, they probably did not get a high enough dose of the deworming medication to work correctly. The medication may kill some of the worms, but not all of them. You may notice dead worms in their feces indicating it's working, but sometimes nothing is seen at all. That is normal, and it doesn't mean the deworming medication isn't working. I would wait a week before giving them another deworming tablet, and this time give it to them whole. You may have to stick it in the back of their throat to get them to take it, but it's best for them to have the whole pill. After that, I would give them another deworming tablet in two weeks. This will make sure that all the worms are killed, as there will be worms in eggs which have not yet hatched at the time of the initial deworming treatment. They should then be dewormed every three months. Good luck, I hope this helps!
1Pet Parents found this answer helpful
Answered By Lindsey Edwards MVB, BSc, IVCA
Veterinarian
Published on November 26th, 2016
Vomiting after deworming medications is not uncommon but as it was so quick (10mins) the tablet will not have had time to work. Consider using a pour on worm medication such as broadline or profender (both of these do both round and tapeworms) or try a different worming product with different ingredients in 10-14days time
1Pet Parents found this answer helpful