Postural orthostatic tachycardia syndrome (POTS) is a condition in which an excessively reduced volume of blood returns to the heart after an individual stands up from a lying down position. The primary symptom is lightheadedness or fainting. Below you may find medications used to treat or help with Postural Orthostatic Tachycardia Syndrome. More about Postural Orthostatic Tachycardia Syndrome