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.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.
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On average, the stomach produces 2 L of hydrochloric acid per day.
Cell
Cancer cell.
Schematic drawing of a rod cell
Cell
The eukaryotic cell cycle consists of two parts: (1) interphase and (2) mitosis followed by cytokine