Dr. Gregory Andrew Hanissian MD

Generic Name: LoratadineBrand Name(s): Alavert, Tavist ND, Dimetapp ND, Claritin RediTabsWhat is loratadine?Loratadine is an antihistamine that blocks the action of histamine, which is a chemical released by mast cells in response to an allergen. When histamine is released, it causes symptoms of...

Lymphocytes are a type of white blood cell produced in the bone marrow. A few lymphocytes enter the bloodstream while some move into the lymphatic system. Having a low or high lymphocyte count can help identify a person's medical condition. Normal lymphocyte counts usually vary from one laboratory...

What is multiple sclerosis (MS)?Multiple sclerosis is a medical condition that affects the brain and the spinal cord. A few of the early symptoms of the disease are numbness, tingling sensation, blurry vision, and feeling weak. In this disease, the immune system tends to attack the myelin, which is...

What is Allergy Shot?An allergy shot, or allergen immunotherapy, is a method in which small amounts of allergens are introduced to the body to stimulate the immune system against a specific allergen, without causing a full allergic reaction. This allows the body to get used to the specific allergen...

Millions of people in United States are affected by different types of allergies. Knowing what causes or triggers an allergic response is important in extending an appropriate and effective treatment for the allergy. With the development of technologies, a number of new medical tests have been...

What is lupus? Lupus is a chronic autoimmune disorder. If you have an autoimmune disorder, your immune system mistakenly attacks the healthy cells in your body, which causes inflammation. Symptoms include extreme fatigue, hair loss, skin rashes, cognitive dysfunction, severe muscle and joint pain,...