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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.