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Tarceva Black Box Warns of Potentially Deadly Side Effects
Tarceva, a drug approved to treat lung and pancreatic cancers, has been linked to serious side effects including sometimes fatal digestive tract perforations and skin reactions, as well as eye problems. The complications linked to Tarceva have prompted the Food & Drug Administration (FDA) to mandate a black box warning for the drug’s label. A black box is the agency’s most serious type of safety alert.
Tarceva is one of a class of cancer drugs known as epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors. These treatments are designed to block the EGFR protein, believed to play a role in cancer cell growth.
As a monotherapy, Tarceva is approved for the treatment of patients with locally advanced or metastatic non-small cell lung cancer after failure of at least one prior chemotherapy regimen. Tarceva in combination with gemcitabine is indicated for the first-line treatment of patients with locally advanced, unresectable, or metastatic pancreatic cancer.
Just this past March, Genentech Inc. and OSI Pharmaceutical Inc., the makers of Tarceva, applied to have the drug approved as a first-line maintenance treatment for lung cancer.
The new Tarceva black box warning was announced by the FDA on Friday. In a letter dated April 2009, Genentech and OSI said that there had been reports of patients suffering gastrointestinal perforations while undergoing Tarceva therapy. This risk is greatest for patients receiving concomitant anti-angiogenic agents, corticosteroids, NSAIDs, and/or taxane-based chemotherapy, or who have prior history of peptic ulceration or diverticular disease. According to the letter, some instances of perforation had been fatal.
The letter also said that some Tarceva patients had developed bullous, blistering and exfoliative skin conditions, which in some cases were suggestive of Stevens-Johnson syndrome or toxic epidermal necrolysis. Again, some of these cases resulted in deaths.
Finally, the letter warned that patients treated with Tarceva had experienced corneal perforation or ulceration. Other eye disorders including abnormal eyelash growth, keratoconjunctivitis sicca and keratitis, have also been observed with Tarceva treatment.
The letter did not say how many cases of patients with Tarceva complications were reported or how many patients died. More than 350,000 patients have been treated with Tarceva worldwide, and global sales of the drug topped $1 billion in 2008.
FDA notes side effects with Genentech cancer drug
The Food and Drug Administration on Friday highlighted new warnings on Terceva, a daily pill from OSI Pharmaceuticals Inc. ( OSIP - news - people ) and Roche ( RHHBY.PK - news - people )-unit Genentech ( DNA - news - people ).
The label warns that some patients have experienced gastrointestinal perforation, in which a hole develops in the intestine or stomach. Some other patients developed blistering skin often seen in connection with toxic drug reactions. Some cases of both conditions were fatal, according to the FDA. The labeling advises doctors to discontinue use of the drug if either condition develops.
Additionally, the label notes that some patients developed scars and ulcers of the eye while taking the drug.
OSI Pharmaceuticals and Genentech notified physicians about the problems in an April letter.
Tarceva, has been approved to treat lung and pancreatic cancer. The drug was developed by OSI Pharmaceuticals Inc. and is sold by Genentech. Switzerland-based Roche agreed to buy South San Francisco-based Genentech in March.
Shares of OSI Pharmaceuticals Inc. fell 78 cents, or 2.4 percent, to close at $33.59 Friday.
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