In rats, the direct thrombin inhibitor melagatran has been shown to prolong SBT, and the prolongation could be reversed by PCC.
All therapies can relieve dysphagia, although no method has been shown to prolong survival.
Still, experts said, Tykerb does not work for all women and has not yet been shown to prolong lives.
The drug, MDV3100, has been shown to prolong survival for postchemotherapy patients but has not yet received regulatory approval.
But while stents have been proved to reduce chest pain, they have not been shown to prolong patients' lives or help them avoid heart attacks.
But insurers and government agencies have eventually accepted Genentech's terms, because its treatments, which include Herceptin, its current breast cancer treatment, have been shown to prolong life.
Because docetaxel has been shown to prolong survival in second-line treatment, a number of novel agents have been combined with docetaxel in order to improve efficacy.
Nothing has been shown to prolong the lives of Class 2 patients, said Dr. Evangelos S. Gragoudas, an ocular oncologist at Massachusetts Eye and Ear Infirmary.
But some patient advocacy groups welcomed the decision, saying Avastin had never been shown to prolong lives and that women with breast cancer need more than false hope.
Treatments for progressive lung diseases, such as idiopathic pulmonary fibrosis and chronic obstructive pulmonary disease (COPD), have improved over the years, and some have been shown to prolong life.
The price was half that of Erbitux, a colon cancer drug from ImClone Systems and Bristol-Myers Squibb that was approved the same month as Avastin and had not been shown to prolong life.
