18 Common Cat De-wormer Side Effects and Tips

De-worming medications for cats are commonly used to eliminate internal parasites such as roundworms, hookworms, and tapeworms. While these medications are generally safe and effective, they can sometimes cause side effects. Here are 18 common cat de-wormer side effects and some tips on how to manage them: Vomiting: If your cat vomits after taking the de-wormer, consult your veterinarian. They may recommend administering the medication with a small amount of food to help prevent this. Diarrhea: Some cats may experience loose stools or diarrhea after de-worming. Ensure your cat stays hydrated, and if the diarrhea persists or worsens, contact your vet. Loss of appetite: Temporary loss of appetite is a common side effect. If your cat refuses to eat after de-worming, try offering small, enticing meals or consult your vet for further advice. Lethargy: Cats may appear tired or less active for a short period after de-worming. Monitor their behavior, and if the lethargy continues for an extended period or worsens, seek veterinary guidance. Allergic reactions: Rarely, cats may have an allergic reaction to de-worming medication. Watch for signs such as difficulty breathing, facial swelling, or hives. If any of these symptoms occur, contact your vet immediately. Excessive drooling: Some cats may drool more than usual after taking de-wormer. This side effect should subside on its own. If it persists or becomes severe, consult your veterinarian. Behavioral changes: Temporary changes in behavior, such as increased restlessness or agitation, can occur. Observe your cat closely, and if the behavior remains abnormal, consult your vet. Limping or unsteady gait: In rare cases, de-worming medication may cause temporary muscle weakness or affect coordination. If you notice significant difficulty in movement, inform your veterinarian. Upset stomach: De-wormers can sometimes cause stomach discomfort or irritation. Administering the medication with a small amount of food may help alleviate this side effect.