Johnson & Johnson has been ordered to pay $4.7bn (£3.6bn) in damages to 22 women who alleged that its talc products caused them to develop ovarian cancer.
A jury in the US state of Missouri initially awarded $550m in compensation and added $4.1bn in punitive damages.
The verdict comes as the pharmaceutical giant battles some 9,000 legal cases involving its signature baby powder.
Johnson & Johnson said it was “deeply disappointed” and plans to appeal.
In the six-week trial, the women and their families said they developed ovarian cancer after using baby powder and other talc products for decades.
Of the 22 women represented in this case, six have died from ovarian cancer.
Their lawyers alleged the company knew its talc was contaminated with asbestos since the 1970s but failed to warn consumers about the risks.
On the research front, There have been concerns for years that using talcum powder, particularly on the genitals, may increase the risk of ovarian cancer – but the evidence is not conclusive. The International Agency for Research on Cancer classifies talc used on the genitals as “possibly carcinogenic” because of the mixed evidence.
Johnson & Johnson said: “Every verdict against Johnson & Johnson in this court that has gone through the appeals process has been reversed and the multiple errors present in this trial were worse than those in the prior trials which have been reversed.”