Hairball

• Both longhaired and shorthaired cats suffer from hairballs, which they sometimes vomit. Groom your cat regularly, and talk to your veterinarian about foods and supplements that reduce the incidence of hairballs.
  
  

Food

• Your cat will vomit if it eats too fast or eats too much. Changes in diet can lead to stomach upset and vomiting. Spoiled foods or an allergic reaction to foods will make cats vomit.
  
  

Poisoning

• Vomiting is caused by poisonous plants, lead paints, coffee, fertilizers and ingesting human medication. Anti-freeze, with its sweet smell and taste, is a leading cause of poisoning among cats.
  
  

Disease

• Addison's disease, intestinal parasites, cancer, inner ear disease, kidney and liver disease, pancreatitis and sepsis can cause vomiting.
  
  

Medical Attention

• Call your veterinarian if you see blood in your cat's vomit or if vomiting continues regularly for more than 24 to 48 hours and the animal appears weak or dehydrated. Seek immediate medical attention if you feel your cat has ingested a poisonous substance.