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Methylphenidate, sold under the brand names Ritalin (/ ˈ r ɪ t ə l ɪ n / RIT-ə-lin) and Concerta (/ k ə n ˈ s ɜːr t ə / kən-SUR-tə) [citation needed] among others, is a central nervous system (CNS) stimulant to treat attention deficit hyperactivity disorder (ADHD) and narcolepsy.
The blood pressure raising and vasoconstrictive effects of adrenal extracts were of particular interest to surgeons as hemostatic agents and as treatment for shock, and a number of companies developed products based on adrenal extracts containing varying purities of the active substance.
A diagram explaining factors affecting arterial pressure. Pathophysiology is a study which explains the function of the body as it relates to diseases and conditions. The pathophysiology of hypertension is an area which attempts to explain mechanistically the causes of hypertension, which is a chronic disease characterized by elevation of blood pressure.
The smaller arteries and arterioles have higher resistance, and confer the main blood pressure drop across major arteries to capillaries in the circulatory system. Illustration demonstrating how vessel narrowing, or vasoconstriction, increases blood pressure. In the arterioles blood pressure is lower than in the major arteries.
For most people, recommendations are to reduce blood pressure to less than or equal to somewhere between 140/90 mmHg and 160/100 mmHg. [2] In general, for people with elevated blood pressure, attempting to achieve lower levels of blood pressure than the recommended 140/90 mmHg will create more harm than benefits, [3] in particular for older people. [4]
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A decreased pulse pressure (systolic blood pressure minus diastolic blood pressure) or a fast heart rate raises concerns. [1] Shock is a medical emergency and requires urgent medical care. If shock is suspected, emergency help should be called immediately.
On this day in 1985, a worldwide rock concert dubbed 'Live Aid' was organized to raise money for the relief of famine-stricken Africans at Wembley Stadium in London. According to History.com, the ...