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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.