Pfizer has agreed to settle more than 10,000 lawsuits which alleged that the company failed to warn patients about possible cancer risks caused by the anti-heartburn medication Zantac.The lawsuits were filed in state courts across the country, but the agreements don’t completely resolve Pfizer’s exposure to the claims linking Zantac and cancer, according to Bloomberg News.Terms of the settlements were not disclosed.The Post has sought comment from Pfizer.Zantac was brought to market in 1983 by Glaxo Holdings, a company that is now part of the GlaxoSmithKline company.By 1988, it was the world’s best selling drug as patients reported benefits for...