Caffeine is sometimes given to people after a lumbar puncture. This is a test to see if someone has meningitis.
In the beginning caffeine was found to relieve hunger, so it was used for weight loss. That did not last because people were using too much. Caffeine can be a very dangerous drug when not used in the right way.
Caffeine also has medicinal properties. It is used in many over the counter medicines, such as Excedrin, Midol and Anacin. When combined with other analgesics, caffeine can help to alleviate headaches and cramps.
The largest problem with caffeine is addiction. This is when people get bad symptoms when they do not have the drug. When people have "withdrawal" (feel bad because they do not have the drug) they drink more. This makes them feel better. But if they cannot get more, they are likely to feel some of the symptoms listed below:
Caffeine can also hurt people if they drink a lot at once. If someone takes too much of a drug at once it is called an "overdose". Caffeine overdose is a medical diagnosis. It is called: "Caffeine-Induced Organic Mental Disorder" or "Caffeine Intoxication". People with this can have these symptoms:
Caffeine also has some strong advantages:
250–300 mg of caffeine a day is a "moderate" amount. That is as much caffeine that is in three cups of coffee (8oz each cup). More than 750–1000 mg a day is a significant amount, but is very unlikely to kill someone. The Lethal Dose 50 of caffeine is 192 mg per kilogram, in rats. In humans, it is between 150 and 200 mg per kilogram (70-90 per pound.)
Caffeine is in many drinks and foods. This is "approximate" amounts of caffeine in some food and drink:
One ounce – abbreviated oz - is 30ml.
A 'cup' is 8 oz (240ml.)
Chicago
Chicago is a city in the U.S. state of Illinois. It is the third largest city in the United States. As of 2018, the population is 2,705,994. It is the city with the largest population in the Midwestern United States. Chicago is the main city of the Chicago metropolitan area, or Chicagoland. The Chicago metropolitan area has 10 million people. This metropolitan area has the third largest population in the United States.
Chicago is by Lake Michigan. Chicago became a city in 1837 and is in between the Great Lakes and the Mississippi River watershed. It grew quickly in the mid-19th century. The Great Chicago Fire of 1871 destroyed many square miles and made more than 100,000 people homeless. Major efforts were made to rebuild it. Chicago's population grew when more construction jobs came. By 1900, Chicago was the fifth-largest city in the world. Chicago is known for its urban planning and zoning standards, for example, new construction styles from the Chicago School of architecture, the development of the City Beautiful Movement, and the steel-framed skyscraper. Chicago built the first skyscraper in the world in 1885, the Home Insurance Building.
Chicago is a center for finance, culture, trade, industry, education, technology, telecommunications, and transportation. It is one of the largest markets of the world. The O'Hare International Airport is the fifth or sixth busiest airport in the world and first or second in the United States. The region has the largest number of federal highways. It has many railroads too.Globalization and World Cities Research Network lists Chicago as an alpha global city. The Global Cities Index ranked Chicago seventh in the world in 2017. The Chicago area generated $689 billion in 2018. It has a very diverse and balanced economy. Chicago is home to several Fortune 500 companies, including Allstate, Boeing, Exelon, Kraft Heinz, McDonald's, Mondelez International, Sears, United Airlines Holdings, and Walgreens.
58 million people visited Chicago in 2018. It was the second most visited city in the United States. New York City had 65 million visitors in 2018. Chicago had first place in the 2018 Time Out City Life Index. This index was a survey about the quality of life in different areas. 15,000 people in 32 cities did the survey.
Some landmarks in the city are Millennium Park, Navy Pier, the Magnificent Mile, the Art Institute of Chicago, Museum Campus, the Willis (Sears) Tower, Grant Park, Chicago Riverwalk, the Museum of Science and Industry, and Lincoln Park Zoo. There are many universities and colleges, for example University of Chicago, Northwestern University, and the University of Illinois at Chicago. Chicago has professional sports teams in the major professional leagues, and two are Major League Baseball teams.
Jean Baptiste Point du Sable founded Chicago in the early 1700s. It was founded to create a canal to let boats on the Great Lakes to connect to the Mississippi River. Later, the city became a trading center for food, crops, and fur. The city grew very fast because of how the river back then was clean and healthy to drink. In 1837, Chicago became a city. The city grew until the Great Chicago Fire in 1871. The fire lasted for almost a week. Almost half the city and its population were lost in the fire. After the fire, Chicago grew faster than ever.
Then, city's economy grew and more people migrated there from other parts of the world. many of the immigrants were Germans, Jews, Irish, Swedes, Poles, and Czechs. The immigrants were almost two-thirds of the city's population. In 1889, Jane Addams built Hull house in Chicago for children and the poor. In 1893, the city hosted the World's Columbian Exposition. In 1892, they created the University of Chicago.
In 1919, the city became known for its gangsters, for example Al Capone, Dean O’Banion, Bugs Moran, and Tony Accardo. In the 1929 Saint Valentine's Day Massacre, Al Capone ordered gangsters to be shot on St. Valentine's Day. Then, the city became known for John Dillinger, a bank robber. He could rob a bank in under two minutes. Dillinger was shot and killed at the Biograph Theatre in 1934.
Anton Cermak was the 44th mayor of Chicago. He was shot and killed during the Democratic party convention in 1933. A man tried to shoot Franklin D. Roosevelt and Cermak blocked the bullet to save the President. Cermak died hours later. In 1955, Mayor Richard J. Daley was a powerful and well known Democrat. He helped Martin Luther King and other activists share their thoughts without being arrested in Chicago.
The 1968 Democratic National Convention had large protests and riots outside the convention. Richard J. Daley helped create the construction sites for the Willis Tower, O'Hare International Airport, the McCormick Place, and the University of Illinois at Chicago. Jane Byrne helped Chicago to become one of the most popular tourist attractions in the United States. She was the first female mayor of Chicago.
In 1982, seven people were poisoned with cyanide in Tylenol pills across the city. This led to changes in the packaging of over-the-counter drugs and to federal anti-tampering laws.
In 1983, Harold Washington became the first African American mayor of Chicago. He helped clean all dangerous and poor neighborhoods in the city. He was later re-elected, but died of a heart attack. He would become the second mayor of Chicago to die from a heart attack while in office. The first was Richard J. Daley. Eugene Sawyer finished Washington's second full term. Sawyer was the second African American Mayor of Chicago.
In 1989, Richard M. Daley, the son of Richard J. Daley, became the mayor of Chicago. Daley was the longest serving Mayor of Chicago.
In 2011, Rahm Emanuel became the first Jewish Mayor of Chicago.
In 2012, the NATO Summit was held in Chicago and lasted for three days. The city would also host the 38th G8 summit. The G8 summit was moved to Camp David because Chicago already hosted the NATO summit.
Chicago has the fourth-largest gross domestic product (GDP) of any city in the world. It is behind Tokyo, New York City, and Los Angeles, and ahead of London and Paris.