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Approximately 25% of all reported medication errors result from some kind of name confusion.
Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.
The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.
There are approximately 3 million unintended pregnancies in the United States each year.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

