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In 1864, the first barbiturate (barbituric acid) was synthesized.

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The horizontal fraction bar was introduced by the Arabs.

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Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

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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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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Energy costs of locomotion. Energy costs of locomotion.
Percentages of adolescents indicating Benefits and Costs of employment. Percentages of adolescents indicating Benefits and Costs of employment.
Poverty rates have declined in the last 50 years, and the biggest decline has been for people 65 and ... Poverty rates have declined in the last 50 years, and the biggest decline has been for people 65 and ...
Health Care Costs for the Elderly and Disabled Health Care Costs for the Elderly and Disabled
A company that makes environmental measuring devices has calculated their revenue and costs as ... A company that makes environmental measuring devices has calculated their revenue and costs as ...
Dagny Taggart is a graduating college senior and she is considering the costs of going to ... Dagny Taggart is a graduating college senior and she is considering the costs of going to ...
Video: Introduction to Dysrhythmia

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