An overactive thyroid may affect more than the body's metabolism. It also appears to be associated with a small increased risk of developing a common heart arrhythmia called atrial fibrillation.

One type of sleeping pill can treat several other conditions, like insomnia, epilepsy and anxiety. But it may also weaken the immune system.

Adults with implanted heart rhythm devices commonly experience lower quality of life. But when it comes to children, little is known about how it impacts life quality.

Herceptin is the standard medication for treating HER2-positive breast cancer. There has been some question about how long this treatment should last. A new study has answered that question.

By the time breast cancer spreads, women have usually had a number of different treatments. They may have been through more than one round of chemotherapy. A study of different chemotherapies has found somewhat puzzling results.

Smoking in the car is only bad if the windows are up, right? Think again! Scientists found extreme pollutants from secondhand smoke in the backseat even with the front windows completely down.

Urinary tract infections (UTI) are more common in women than in men. But for men who have UTIs, poorly defined treatments can lead to antibiotic resistance and higher costs.

Antidepressants are great for treating depression – when they work. But what about depressed patients who don't get better with antidepressants? They could try a certain talk therapy.

Organ transplants can save lives. Sadly, there are not enough organs to match the number of patients who need organs. Some US states have started giving tax breaks to living organ donors.

How exactly a diabetes drug helps ovarian cancer patients is still unknown, but the success rate is very encouraging. Further studies are needed to see if metformin should be made part of standard treatment.