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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

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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.

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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

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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.

A computer rendition of biological chromosomes (biology) A computer rendition of biological chromosomes (biology)
An electrocardiogram (ECG, EKG) is a commonly used procedure in which the electrical events associat An electrocardiogram (ECG, EKG) is a commonly used procedure in which the electrical events associat
The initial timing is where the spark plug fires at idle speed. The computer then advances the ... The initial timing is where the spark plug fires at idle speed. The computer then advances the ...
Schematic of a mitochondrion and Computer model generated from electron tomograms of a mitochondrion Schematic of a mitochondrion and Computer model generated from electron tomograms of a mitochondrion
When The World Stops Turning (Quiet Mix) When The World Stops Turning (Quiet Mix)
(a) A metaphase array of chromosomes as viewed in the microscope. (b) The computer-derived karyotype (a) A metaphase array of chromosomes as viewed in the microscope. (b) The computer-derived karyotype
Video: Transcription—A molecular view

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