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The average cough, typically due to a cold or other respiratory virus, lasts three weeks or less. A lingering or chronic cough lasts eight weeks or longer. Most causes of chronic cough aren't serious, such as bronchitis, seasonal allergies, or medication side effects. People should see a doctor if over-the-counter treatments haven't worked or if they experience signs such as breathlessness, wheezing, chest pain, blood in the sputum, weight loss, or fatigue. Before an appointment, people should track their cough and note its patterns to offer clues for diagnosis.

Antidepressants influence the way brain chemicals regulate mood and other body functions and behaviors. Examples include selective serotonin reuptake inhibitors, such as fluoxetine (Prozac) and citalopram (Celexa); and serotonin and norepinephrine reuptake inhibitors, such as venlafaxine (Effexor) and duloxetine (Cymbalta). Although the medications are commonly used to treat depression, sometimes they are used to treat other conditions such as insomnia, headaches, gynecological pain, or nerve pain.

Tonsil stones are small white or yellow deposits on the tonsils. They develop when bacteria, saliva, food particles, and debris from cells lining the mouth get trapped in tiny indentations on the tonsils. While usually harmless, they can cause bad breath and sore throats.

Tardive dyskinesia (TD) is a condition marked by involuntary movements of the face or limbs, caused by long-term use of certain drugs, many of which are for mental health conditions. An ad for a once-daily drug to treat TD leaves some important questions unanswered.