A spokeswoman, Catherine Babington, said the company, based in Abbott Park, Ill., had not determined the amount of the second-quarter charge.
Norvir is marketed by Abbott Laboratories based in Abbott Park, Ill.
Shares of Abbott, based in Abbott Park, Ill., fell 75 cents, to $43.50.
Abbott, which is based in Abbott Park, Ill., said its worldwide sales of drug and nutritional products rose 9.9 percent, to $1.53 billion.
Abbott, based in Abbott Park, Ill., noted that patient safety was never an issue in the investigations.
The company headquarters are in Abbott Park, North Chicago, Illinois.
Abbott, which is based in Abbott Park, Ill., now has 10 days to present a counteroffer before Brazil officially breaks the patent.
Abbott Laboratories is based in Abbott Park, Ill.
She was a Senior counsel for Abbott Laboratories, Abbott Park, Illinois from 2001 until 2002, when she became a federal judge.
Abbott, based in Abbott Park, Ill., has interests in hospital supplies, pharmaceuticals, infant formula and chemicals, with annual revenues last year of $5.4 billion.