Is Thyroid Hormone Dangerously Overprescribed in Older Patients?

Thyroid hormone replacement therapy is commonly prescribed when blood tests show a dip in thyroid hormone levels, but new research suggests it may not always be the best choice for older adults.

The long-term study found that people over 65 who take thyroid hormone replacement therapy have a higher risk of death than their peers who d...

How Ritalin Works in the Brain

A new study dispels a common belief about how stimulants such as Ritalin and Adderall work in the brain.

The drugs are usually prescribed to people with attention deficit hyperactivity disorder (ADHD), but are sometimes used by otherwise healthy people to boost their thinking.

Many assume these drugs improve focus, but resea...

FDA Pulls Heartburn Drug Zantac From Market

All versions of the heartburn drug Zantac (ranitidine) have been pulled from the U.S. market due to possible contamination with a probable cancer-causing chemical, the U.S. Food and Drug Administration said Wednesday.

This is the latest step in an ongoing investigation of N-Nitrosodimethylamine (NDMA) in ranitidine medications, the age...

'Pink Eye' Often a Symptom of COVID-19, and Infection Via Tears Possible

Besides causing COVID-19, the new coronavirus can also lead to "pink eye," and Chinese researchers say the virus may be spread by tears.

Of 38 patients with COVID-19, a dozen also had pink eye (conjunctivitis), a new study found. In two patients, the coronavirus was present in both nasal and eye fluids.

"Some COVID-19 patien...

Pain Is a Growing Threat to the Nation's Surgeons, New Research Reveals

Many surgeons have neck and back pain after performing operations, a small new study finds.

It included 53 surgeons (34 men and 19 women) who did 116 operations at the Mayo Clinic in Phoenix. They wore devices that measured neck, back and arm posture during surgery, and were asked about pain and fatigue levels before and after.

Mild COVID-19 Often Appears With Only Gastro Symptoms: Study

When most people think of COVID-19, they imagine symptoms such as a dry cough and high fever. But new research out of China shows that a minority of cases appear with gastrointestinal symptoms only.

In about one-quarter of patients in the new study, diarrhea and other digestive symptoms were the only symptoms seen in mild COVID-19 case...