Since Medco and Express Scripts have come together as one company to manage your prescription drug benefit, the information Medco had on file for you is now available to the merged company.
Frigid winds make you shiver; dry air chaps unprotected lips and hands; and a lack of sunshine can even cause depression. Cold weather also puts immense strain on the heart. Low temperatures cause your blood vessels and arteries to narrow, restricting blood flow and reducing oxygen to the heart. Your heart must pump harder to circulate blood through the constricted blood vessels. As a result, your blood pressure increases. A sudden spike in blood pressure â especially when paired with outdoor exertion, such as shoveling a snowy sidewalk â can cause serious issues such as: 1  Unstable chest pain.
If body temperature starts to rise, the blood vessels in the skin, which are a part of the cardiovascular system, dilate so that more blood is brought to the surface of the skin for cooling, and the sweat glands become active.f the outer temperature is cool, the sweat glands remain inactive, and the blood vessels constrict so that less blood is brought to the skin's surface. Whenever the body's temperature falls below normal, the muscles start to contract, causing shivering, which produces heat.