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Did you know?

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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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

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Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

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In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Brain scans showing the white-matter pathways involved in everyday learning: Brain scans showing the white-matter pathways involved in everyday learning:
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A Circumstellar Disk of Matter A Circumstellar Disk of Matter
Mapping Dark Matter Mapping Dark Matter
In 2005 historian Angela Lakwete used this print as the cover of Inventing the C In 2005 historian Angela Lakwete used this print as the cover of Inventing the C
Video: Random alignment at Metaphase I Animation

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