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.
The patient's medication list should be examined for drugs known to cause hyponatremia. Hyponatremia has been noted in patients with poor dietary intake who consume large amounts of beer (called beer potomania) and after use of the recreational drug N- methyl-3,4-methylenedioxyamphetamine (ie, MDMA or ecstasy).