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Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

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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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Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

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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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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Examples of deep-sea corals found in the Sable Gully, 200 km off the coast of Nova Scotia. Examples of deep-sea corals found in the Sable Gully, 200 km off the coast of Nova Scotia.
Some of the many small molecules found in cells Some of the many small molecules found in cells
Oxygen dissociation curve Oxygen dissociation curve
Connecting a handheld digital storage oscilloscope to an oxygen sensor signal wire. The use of the ... Connecting a handheld digital storage oscilloscope to an oxygen sensor signal wire. The use of the ...
When the engine is cold and before the oxygen sensor is hot enough to achieve closed-loop, the ... When the engine is cold and before the oxygen sensor is hot enough to achieve closed-loop, the ...
A typical intertidal zone A typical intertidal zone
Video: B cells and antibodies

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