
Johnson & Johnson has agreed to revised language on the label of its Janssen coronavirus vaccine that warns of the danger of blood clots, a company official told US Centers for Disease Control and Prevention vaccine advisers on Friday.
CDC’s Advisory Committee on Immunization Practices is holding an emergency meeting to discuss potential changes to guidance for who should get the vaccine.
CDC and the US Food and Drug Administration have paused use of the vaccine while they investigate the risk of a rare blood clotting syndrome.
Johnson & Johnson Chief Medical Officer Dr. Joanne Waldstreicher said the company had worked out revised label language with the FDA.
“We absolutely agree with the FDA on the implementation of a warning within our label and patient and physician fact sheets describing this very rare event, including how it can be identified early and diagnosed and treated,” she told ACIP.
“To that end, here is the language from our label that we have agreed upon with the FDA regarding thrombosis with thrombocytopenia.”
The revised language refers to blood clots in the brain combined with a blood clotting abnormality called thrombocytopenia. “Reports of adverse events following use of the Janssen Covid-19 vaccine … suggest an increased risk of thrombosis,” it reads, and says the relationship between the vaccine and the clots is “plausible.”
“In addition to the description of the event, health care professionals are alerted in the fact sheet to the signs and symptoms of thrombosis with thrombocytopenia in individuals who receive the COVID vaccine from Janssen,” Waldstreicher said.
“It also states that symptoms began approximately one to two weeks following vaccination, and that most people were females, aged 18 through 49, and that some cases have been fatal. Health care professionals are also directed to the published American Society of Hematology considerations, relevant to the diagnosis and treatment. In addition, the patient's fact sheet contains a clear warning and instruction. J&J strongly supports this enhanced labeling.”
ACIP will vote later Friday on whether to change recommendations.