The drug was previously approved as a booster vaccine against tetanus, diptheria, and pertussis in patients ages 10 to 18.
The approval was based on results of two clinical trials enrolling 3,000 patients ages 
The drug was previously approved as a booster vaccine against tetanus, diptheria, and pertussis in patients ages 10 to 18.
The approval was based on results of two clinical trials enrolling 3,000 patients ages 19 to 64, which demonstrated the safety and robust immune response of the vaccine, the company said.
The CDC recommends a single Tdap vaccination for adults in place of a tetanus diptheria (Td) booster if the last dose of the Td vaccine was received 10 or more years prior.
Andrew C. Eisenberg, M.D., of Texas A&M School of Rural Public Health, said the vaccine can be given in place of one Td booster.
According to CDC data, about 98% of adults 18 to 64 haven't received a pertussis booster shot.