A new provocative work by bestselling author Ed Klein claims that the former first lady and secretary of state's "health problems are much more severe than she has publicly revealed," according to Drudge Report, an American news aggregation website.
"She had managed to keep her medical history secret out of fear that, should it become public, it would disqualify her from becoming president," writes Klein in "Blood Feud" due out this week.
According to excerpts published by Drudge Report "Hillary fainted while she was working in her seventh-floor office at the State Department" and was flown to New York-Presbyterian Hospital at the instance of her husband and former president Bill Clinton.
There Hillary Clinton was diagnosed with several problems: "She had a right transverse venous thrombosis, or a blood clot between her brain and skull. She had developed the clot in one of the veins that drains blood from the brain to the heart."
"The doctors explained that blood stagnates when you spend a lot of time on airplanes, and Hillary had clocked countless hours flying around the world," the excerpts said.
"To make matters worse, it turned out that Hillary had an intrinsic tendency to form clots and faint," the book claimed.
"In addition to the fainting spell she suffered in Buffalo a few years before, she had fainted boarding her plane in Yemen, fallen and fractured her elbow in 2009, and suffered other unspecified fainting episodes."
"The unique thing about clotting in the brain is that it could have transformed into a stroke," the report said citing a cardiac specialist with knowledge of Hillary's condition.
Before the new revelations about her health, Clinton has had to face questions about her wealth during "the tightly orchestrated book tour for her new memoir" that "has closely resembled a campaign," according to CNN.
Clinton's first misstep came when she told ABC at the start of her book tour this month that she and her family "came out of the White House not only dead broke but in debt," adding later that her family had "no money" at that time.
The news channel noted Hillary Clinton and her husband "were obviously well positioned to quickly capitalize on the post-presidential custom of cashing in".
She also "had a massive book advance in the works and, along with the former president, the prospect of making millions. This is what fuelled cries of hypocrisy."
"And while pro-Clinton Democrats have defended her, others in the party have begun to knock her - some more subtly than others. They also say she's out of touch," CNN said.