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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.
The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
The horizontal fraction bar was introduced by the Arabs.