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More than 4.4billion prescriptions were dispensed within the United States in 2016.

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A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

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In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Ventilation of the mammalian lung by negative pressure filling. Ventilation of the mammalian lung by negative pressure filling.
The Inner Surface of Human Lung The Inner Surface of Human Lung
Pneumothorax; A, penetrating wound; B, ruptured bleb on the lung. Pneumothorax; A, penetrating wound; B, ruptured bleb on the lung.
Iron deficiency anemia blood cells. Iron deficiency anemia blood cells.
Bronchogenic carcinoma. An illustration of a sectioned lung that contains tumors associated with a b Bronchogenic carcinoma. An illustration of a sectioned lung that contains tumors associated with a b
Sickle-cell anemia Sickle-cell anemia
Video: DNA Replication

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