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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

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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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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

Any number of crossovers gives 50 percent recombinants Any number of crossovers gives 50 percent recombinants
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