This surprising discovery may hold the key to calmer nerves. A new study out of Brazil found that a low dose of a common antibiotic, typically used to treat acne, rosacea and a range of bacterial infections, could also help people living with panic disorder. The findings suggest the drug might one day offer an alternative for patients who don’t respond to psychiatric medications, including benzodiazepines, or “benzos,” like clonazepam. Panic disorder is currently treated with psychotherapy and medications, such as benzos. terovesalainen – stock.adobe.com These episodes come on suddenly as waves of intense fear, often striking in otherwise normal, nonthreatening situations. They can bring on physical symptoms such as a racing heart, chest pain, sweating and shortness of breath. About 11% of Americans experience a panic attack each year. For some, however, these episodes become a regular, unpredictable occurrence — a condition known as panic disorder.…