Identification

• There are two types of roundworms that affect cats: Toxascaris leonina and Toxocara cati. These parasites absorb nutrients in your cat's intestines.
  
  

Diagnosis

• Adult roundworms may be visualized in feces or vomit. Worms can be seen when a veterinarian tests fecal samples.
  
  

Treatment

• In addition to prescription medications, there are two non-prescription medications available for the treatment of roundworms. Hartz Advanced Care Liquid Wormer and Seargent's Worm Away are available over the counter. These brand-name medications both contain the active ingredient piperazine, which is effective against ascarids.
  
  

Considerations

• Cats under six weeks of age, or cats who are elderly, pregnant or immune compromised should not be given roundworm medication without the supervision of a licensed veterinary medical professional.
  
  

Warning

• Roundworms are zoonotic, meaning they are transmissible to humans. Observe proper sanitation and hygiene protocols to avoid infection.
  
  

Effects

• Side effects are not common with piperazine. Nausea, vomiting and muscle tremors occur in the event of an overdose. In animals with a large quantity of roundworms, intestinal obstruction or rupture may occur.