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 use of medications such as diuretics as well as medical conditions such as decreased liver and kidney function lead to low sodium levels in the blood, or hyponatremia, in older adults, states Mayo Clinic. Other risk factors include some cancers, underactive thyroid or adrenal glands and antidepressants. Keep Learning.