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The company's report states that the drug makers hit hardest will include Otsuka, Eli Lilly, and AstraZeneca (AZ), with a significant proportion of losses coming in the Central Nervous System (CNS) treatment sector.
Mr Adam Dion, GlobalData's Analyst covering healthcare industry dynamics, states that Eli Lilly and AZ have seen profits fall in the CNS therapeutics market since 2010, with the latter losing the greatest share over the past three years.
He comments: "AZ's CNS segment has been bleeding sales as a result of the company losing its patent on Seroquel (quetiapine fumarate), a treatment for bipolar disorder, which led to the entry of cheaper generic alternatives from Teva and Sandoz. We estimate AZ's share to have been around 9% in 2010, which has now fallen to only 3% in 2013.
"Eli Lilly's market share declined from 14.3 percent in 2010 to 11.2 percent in 2013, primarily thanks to decreasing sales of Zyprexa (olanzapine), the company's dopamine antagonist used to treat schizophrenia and bipolar disorder. Zyprexa sales have plummeted from over $5 billion to $1.2 billion over the same period, as a result of the drug losing its US patent exclusivity in 2011."
The analyst adds that while Otsuka's anti-psychotic drug Abilify (aripiprazole), which the company co-markets with Bristol-Myers Squibb, was the sales leader in the CNS arena with $9.5 billion in 2013, the drug faces a less positive future.