Diphenhydramine: a Common Allergy Medication Ingredient

Diphenhydramine is an antihistamine. It works by blocking the action of histamine, a substance in the body that causes allergic symptoms. It's a common ingredient in allergy and cold medications. Learn more about this medication and the side effects it can cause.

Skin Cancer Detection and Prevention

Skin cancer is the most common type of cancer in the United States. Most skin cancers are caused by too much exposure to ultraviolet (UV) rays from the sun or from man-made sources. You don’t need x-rays or blood tests to find skin cancer early – just your eyes and a mirror. If you have skin cancer, finding it early is the best way to make sure it can be treated with success.

Who Should Use Sunscreen?

Everyone should use sunscreen. Exposure to the sun or ultraviolet (UV) light puts you at risk for skin cancer, regardless of your age, gender, or race. Learn the basics of how to apply and store your sunscreen.

What is an Autoimmune Disease?

Your body's immune system protects you from disease and infection. But if you have an autoimmune disease, your immune system attacks healthy cells in your body by mistake.

There are more than 80 types of autoimmune disease. Some of the more common autoimmune diseases include type 1 diabetes, rheumatoid arthritis, multiple sclerosis, lupus, celiac disease, psoriasis, and Crohn’s disease.

Green and Black Teas

Green and black teas come from the same plant, Camellia sinensis, but are prepared differently. Tea has been used for medicinal purposes for thousands of years. Learn about black tea’s interactions with foods, medications, and herbs and supplements.