• Hyperthyroidism is a common condition in older felines. Symptoms include weight loss, diarrhea, vomiting, frequent drinking and urination and increased appetite without corresponding weight gain. Since these symptoms mimic other conditions, take your cat to a veterinarian for blood tests and a diagnosis. Herbs may aid mild cases, but this is a serious illness, and owners considering herbal treatment should consult with holistic veterinary practitioners to see if herbal treatment is recommended.
  
  

Astragalus

• Astragalus, a traditional Chinese herbal medicine, may be used in felines with mild hyperthyroidism. Also known as Huang Qi, it helps regulate blood pressure and blood sugar in cats. It also protects the immune system. It is used in this treatment to balance the endocrine system, including the thyroid and adrenal glands. It's available as an ingredient in herbal feline hyperthyroid formulas, in pet stores and online, or can be given separately as per the veterinarian's instructions.
  
  

Bugelweed/Lycopus

• This native American herb of the mint family is also referred to as water bugle and Virginia bugle. It reduces thyroid stimulating hormones in the body. Because of its calming effect, it is used in combination with other herbs in tonics for cats with hyperthyroidism. These tonics are either given orally or mixed in food.
  
  

Lemon Balm

• This southern European herb, also referred to as Melissa officinalis, may reduce thyroid output and is usually combined with other herbal formulations for cats with hyperthyroidism. Lemon balm, a member of the mint family, reduces stress and is mildly antibiotic in nature.
  
  

Chamomile

• chamomile, a member of the daisy family, is another popular herb in cat hyperthyroidism formulations. It relieves anxiety and has a calming effect on felines. It helps quiet intestinal side effects of the disease.