SUMMARY: AbbVie continues to profit from Americans by repeatedly raising U.S. prices on its widely-used Humira rheumatoid arthritis drug while cutting the price abroad. AbbVie exploits the U.S. patent system to fend off competitors and increased the price of Humira to $77,000 for a year’s supply, while the price of its cancer drug Imbruvica was raised to $181,529 per year.