Medical Drugs

Belviq (lorcaserin) Lawsuit

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A prescription that’s supposed to help manage your weight shouldn’t worsen your overall health. But concerns that weight-loss drugs Belviq® and the extended-release version, Belviq XR®, may cause an increased risk of cancer prompted manufacturer Eisai to voluntarily withdraw them from the U.S. market in February 2020.

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If you or a loved one was diagnosed with pancreatic, colorectal, lung or other types of cancer after taking Belviq or Belviq XR for weight loss, you may have a claim. Complete this webform or call 1.800.768.4026 to contact attorney Carmen Scott for more information or to discuss a potential claim.

Belviq withdrawal background

Prescription weight-loss drugs Belviq and Belviq XR are marketed as a way to help patients who are struggling with obesity feel full while on reduced-calorie diets. The FDA approved the drug in 2012, but required Eisai to complete a clinical trial to assess the safety and efficacy of the drug.

After reviewing the trial data, the FDA announced in January 2020 that the drug was a possibly associated with an increased risk of several types of cancer, including:

  • Pancreatic
  • Colorectal
  • Lung 

Within weeks of its announcement, the FDA reported that it asked Eisai to remove the drug from the U.S. market, and that in response Eisai asked the FDA to voluntarily withdraw the drug.

As a result, the FDA told health professionals they should stop prescribing Belviq and generic lorcaserin, tell patients taking Belviq or lorcaserin about the increased cancer occurrence seen in the clinical trial, and discuss with patients alternative medicine or weight loss strategies.  

Health professionals and patients who observe adverse side effects or a cancer such pancreatic, colorectal, or and lung cancer is found in a patient who took Belviq should n report the issue to the FDA.

Our medical drug litigation experience

Motley Rice medical attorneys have extensive experience litigating for patients who have suffered severe harm and complications caused by dangerous prescription and over-the-counter drugs. We understand that as a patient or family member, what you know about the medicines you or your loved one take and the risk the medicine may hurt you, may be limited. If you believe a medicine made you sick or hurt you, our attorneys have the resources needed to thoroughly investigate and:

  • Identify potentially harmful medicines,
  • Determine if the medicine hurt you,
  • Review the medicine manufacturer’s compliance with FDA regulations,
  • Confirm if the manufacture adequately warned you about potential side effects,
  • Identify anything the manufacturer did wrong or illegal concerning your medicine, and
  • Recognize other issues that could affect your potential claim. 

In addition to reviewing claims related to Belviq and Belviq XR, our attorneys also represent clients in multiple medical drug cases, including cases involving  diabetes drugs Januvia®, Victoza®, Janumet®, and Byetta®; chemotherapy drug Taxotere®; gout medication Uloric®; heartburn medication Zantac®;  MS medication Zinbryta®; and nausea medication Zofran®.


Always consult a medical professional before stopping or changing any medication.

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