| 2022 | United States | Judgment for company / dismissed | There have also been thousands of lawsuits alleging that Fosamax increased the risk of thigh-bone fractures. In March 2022, Merck defeated approximately 500 lawsuits over Fosamax in New Jersey when U. Wikipedia: Merck & Co.（Lawsuits and controversies） | — |
| 2021 | United States | Filed / under investigation | In 2021, an investigation by Reuters revealed that Merck's baldness drug Propecia ( finasteride ) caused persistent sexual dysfunction in men. The drug has been linked to over 700 incidences of suicid Wikipedia: Merck & Co.（Lawsuits and controversies） | — |
| 2020 | Switzerland | Judgment against company | In April 2020, in the course of litigation of Merck against MSD in Switzerland, the Federal Supreme Court of Switzerland ruled that MSD's use of the "Merck" brand in its global websites could, absent Wikipedia: Merck & Co.（Lawsuits and controversies） + 1 more reports | — |
| 2016 | United States | Filed / under investigation | In response to the ruling, MSD initiated counter-litigation in the United States in January 2016 by filing a federal lawsuit which accused its former parent company of "infringing on its trademark" th Wikipedia: Merck & Co.（Lawsuits and controversies） + 1 more reports | — |
| 2015-03-26 | United States | Filed / under investigation | United States ex rel. Solis v. Millennium Pharmaceuticals, Inc. District Court, E.D. California | — |
| 2015 | United Kingdom | Judgment against company | In 2015 the Merck Group adopted a new logo and said it will be "much more aggressive" about protecting the brand of "the real Merck". Merck of Darmstadt has initiated litigation against its former sub Wikipedia: Merck & Co.（Lawsuits and controversies） + 1 more reports | — |
| 2013 | United States | Settlement | In December 2013, Merck agreed to pay a total of $27.7 million to 1,200 plaintiffs in a class action lawsuit alleging that the company's osteoporosis drug had caused them to develop osteonecrosis of t Wikipedia: Merck & Co.（Lawsuits and controversies） | $27.7 million |
| 2012-04-19 | United States | Fine / administrative sanction | U.S. Pharmaceutical Company Merck Sharp & Dohme Sentenced in Connection with Unlawful Promotion of Vioxx U.S. Department of Justice + 1 more reports | $321,636,000 |
| 2011-11-22 | Switzerland | Settlement | U.S. Pharmaceutical Company Merck Sharp & Dohme to Pay Nearly One Billion Dollars Over Promotion of Vioxx® U.S. Department of Justice | $950 million |
| 2011-11-22 | United States | Settlement | U.S. Pharmaceutical Company Merck Sharp & Dohme to Pay Nearly One Billion Dollars Over Promotion of Vioxx® U.S. Department of Justice | $950 million |
| 2008 | United States | Settlement | On May 20, 2008, Merck settled for $58 million with 30 states alleging that Merck engaged in deceptive marketing tactics to promote Vioxx . All its new television pain-advertisements must be vetted by Wikipedia: Merck & Co.（Lawsuits and controversies） | $58 million |
| 2007 | United States | Settlement | About 50,000 people sued Merck, claiming they or their family members had suffered medical problems such as heart attacks or strokes after taking Vioxx. In November 2007, Merck agreed to pay $4.85 bil Wikipedia: Merck & Co.（Lawsuits and controversies） | $4.85 billion |
| 2007 | United States | Settlement | In February 2007, Merck paid $2.3 billion to the Internal Revenue Service to settle a tax dispute over the accounting treatment of transactions between 1993 and 2001. Wikipedia: Merck & Co.（Lawsuits and controversies） | $2.3 billion |
| 2007 | United States | Settlement | In 2007, Merck settled Clean Water Act violations related to the discharge of potassium thiocyanate and resulting fish kills in the Wissahickon creek. In 2011, Merck paid a $1.5 million civil penalty Wikipedia: Merck & Co.（Lawsuits and controversies） | $1.5 million |
| 2006-10-05 | United Kingdom | Industry-code breach ruling | Industry group suspends drug company for breaching code BMJ | — |
| 2000 | United States | Settlement | A fraud investigation by the United States Department of Justice began in 2000 when allegations were brought in two separate lawsuits filed by whistleblowers under the False Claims Act . They alleged Wikipedia: Merck & Co.（Lawsuits and controversies） | $650 million |