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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.

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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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According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

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

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The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Caribou licking salt from roadway in British Columbia Caribou licking salt from roadway in British Columbia
British Library British Library
John Macadam John Macadam
This 1795 engraving of a Stamp Act protest delineates a class division. The three British Tories—one This 1795 engraving of a Stamp Act protest delineates a class division. The three British Tories—one
John Locke (1632–1704). John Locke (1632–1704).
British Iron Production, 1600–1870 British Iron Production, 1600–1870
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