In the elliptical orbit, the center of mass of the orbiting-orbited system is at one focus of both orbits, with nothing present at the other focus. As a planet approaches periapsis, the planet will increase in speed, or velocity.
Drugs that cause hyponatremia include: 1  Diuretics: Thiazides, bumetanide, indapamide, ethacrynic acid, furosemide. 2  Antidepressants: Selective serotonin reuptake inhibitors, tricyclic antidepressants (amitriptyline, protriptyline, desipramine), monoamine oxidase inhibitors, venlafaxine.
In many of these cases, the cause of hyponatremia was purported to be the result of a drug-induced syndrome of inappropriate secretion of antidiuretic hormone (SIADH). When suppression of antidiuretic hormone is impaired, as may be induced by ACE inhibitors, water is retained and sodium is lost.