Alexion Pharmaceutical’s Soliris, the most expensive drug prescription, costs approximately over $490,000 US Dollars (USD) every year. This medication is a monoclonal antibody drug, in which antibodies are used in an attempt to have the body’s immune system fight against autoimmune disease. Soliris began being sold in 2009 for the treatment of paroxysmal nocturnal hemoglobinuria (PNH), a rare disorder that causes the body’s immune system to kill off its own red blood cells nightly. This can result in life-threatening blood clots or excessive bleeding. The high cost of Soliris is thought to be the result of how rare PNH is, as the disorder affects approximately 8,000 Americans each year.
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