Zofran Lawsuits: Essential Updates and Information

Zofran, an anti-nausea medication commonly prescribed to pregnant women for morning sickness, has been at the center of numerous lawsuits in recent years. Many women have filed claims against the drug’s manufacturer, GlaxoSmithKline, alleging that the company failed to warn patients about the potential for birth defects associated with the drug. Over 670 lawsuits have been filed by mothers whose babies suffered from defects such as cleft palates, kidney malformations, skull deformities, and heart defects.

These lawsuits have led to contentious legal battles, with GlaxoSmithKline repeatedly denying the allegations that Zofran has caused birth defects. Despite the increasing number of cases, the company has managed to secure some victories in court. This ongoing litigation has raised questions about the safety of using Zofran during pregnancy, leaving many expectant mothers concerned over the potential risks to their unborn children.

Zofran and Its Usage

Treatment for Nausea and Vomiting

Zofran, a brand name for the drug ondansetron, is developed by GlaxoSmithKline and primarily used to treat nausea and vomiting in patients undergoing chemotherapy, radiation therapy, or surgery. It works by blocking the action of serotonin, a neurotransmitter that can cause vomiting. This medication has been particularly helpful for cancer patients who experience severe nausea and vomiting as a side effect of their treatments. It is administered in various forms including oral tablets, orally disintegrating tablets, and intravenous injection.

Off-Label Use for Morning Sickness

Although Zofran is not specifically approved by the FDA for treating pregnancy-related nausea and vomiting, it has been prescribed off-label for this purpose, including cases of severe morning sickness and a condition called hyperemesis gravidarum. Hyperemesis gravidarum is a more severe form of morning sickness that can cause dehydration, weight loss, and electrolyte imbalances in pregnant women. Some healthcare providers have been prescribing Zofran to help alleviate these symptoms and provide relief to affected expectant mothers.

However, concerns have been raised regarding the potential risks Zofran may pose to pregnant women and their unborn children. There are currently numerous lawsuits filed against GlaxoSmithKline, alleging that the company failed to warn about potential birth defects associated with the use of Zofran during pregnancy. These lawsuits claim that babies who were exposed to Zofran prenatally have suffered from a range of birth defects, including cleft palates, kidney malformations, skull deformities, and heart defects.

Health Risks and Birth Defects

Zofran, an anti-nausea drug commonly prescribed to pregnant women, has been the subject of numerous lawsuits due to its alleged association with various birth defects. These defects can range from physical malformations to congenital heart problems, and have led to significant legal action against the drug’s manufacturer, GlaxoSmithKline.

Physical Birth Defects

Zofran has been linked to several types of physical birth defects, including cleft lip, cleft palate, kidney malformations, and skull deformities. Pregnant women who took Zofran during their pregnancy claimed that the drug caused these defects in their unborn children. According to lawsuits, more than 670 Zofran lawsuits have been filed by mothers whose babies suffered from these types of birth defects.

Cleft lip and cleft palate can cause difficulties in feeding, speech development, and can result in multiple surgeries to correct the malformation. Kidney malformations and skull deformities can have life-long impacts on a child’s health and development, necessitating medical intervention and ongoing care.

Congenital Heart Defects

Zofran has also been linked to congenital heart defects, such as atrial septal defect, ventricular septal defect, and heart murmurs. These types of defects occur when there is an abnormality in the structure of the heart, which can affect its function and potentially cause serious health complications.

Atrial septal defect involves a hole in the wall that separates the upper chambers of the heart, while ventricular septal defect is a hole in the wall separating the lower chambers. Both of these defects can lead to improper blood flow, placing strain on the heart and potentially resulting in heart failure if left untreated. Heart murmurs, which are abnormal sounds produced by turbulent blood flow through the heart, can also be indicative of more serious underlying heart abnormalities.

The alleged association between Zofran use during pregnancy and these congenital heart defects has further fueled the lawsuits against GlaxoSmithKline, with affected families seeking justice for the harm caused to their children.

Legal Background and Lawsuits

GlaxoSmithKline’s Off-Label Marketing

Zofran, manufactured by GlaxoSmithKline (GSK), was approved by the U.S. Food and Drug Administration (FDA) for treating nausea and vomiting in cancer patients undergoing chemotherapy and radiation therapy. However, it has been prescribed off-label for pregnant women to control morning sickness. GSK faced allegations of promoting Zofran for off-label uses, which is a violation of federal law. In 2012, GSK reached a $3 billion settlement with the U.S. Department of Justice over several allegations, including off-label marketing of Zofran.

Litigation Process

Due to numerous Zofran lawsuits filed by mothers whose babies suffered birth defects, the cases were consolidated into a multidistrict litigation (MDL) in the U.S. District Court in Boston. The MDL process allows for more efficient handling of similar cases and streamlines the litigation process. In these lawsuits, plaintiffs claimed that GSK failed to warn about the risks of birth defects associated with Zofran use during pregnancy. Birth defects mentioned in the lawsuits include cleft palates, kidney malformations, skull deformities, and heart defects.

Key Lawsuits

One of the first Zofran-related lawsuits was filed by Cheri Flynn on behalf of her two children who were born with serious heart abnormalities. Flynn was prescribed Zofran early in her first trimester of pregnancy to control morning sickness. However, in June 2021, a judge ruled in favor of GSK, defeating 425 lawsuits and stating that the FDA had repeatedly declined to require additional warnings about birth defects on Zofran’s label. On January 9, 2023, a federal appeals court further declined to revive hundreds of Zofran birth defect cases against GSK.

In summary, the legal background of Zofran lawsuits primarily revolves around off-label marketing, a complex litigation process, and key legal cases that have contributed to the current state of the litigation. Throughout the proceedings, plaintiffs have contended that GSK failed to properly warn about the risks associated with Zofran use during pregnancy, while GSK has continued to defend its stance on the matter.

Regulations and FDA

FDA Approval and Labeling

Zofran, an anti-nausea medication, was initially approved by the U.S. Food and Drug Administration (FDA) for use in specific cases, such as nausea and vomiting caused by cancer treatment or surgery. However, the drug’s usage grew to include treatment for morning sickness during pregnancy, even though it was never approved for this particular purpose. The FDA label for Zofran does not mention pregnancy or its potential risks for pregnant women. Studies on animals have been conducted to assess the safety of the drug, including Japanese animal studies, but there is still ongoing debate regarding its risk to humans.

Changing Regulations and Warnings

Over the years, regulatory agencies worldwide have looked into the safety and efficacy of Zofran. In the U.S., concerns about its use during pregnancy led to several lawsuits alleging that GlaxoSmithKline (the manufacturer) failed to properly warn patients about the potential risks of birth defects. On June 13, 2023, a federal appeals court refused to revive hundreds of Zofran birth defect cases against GSK.

The manufacturer has repeatedly requested the FDA to review the label and assess the need for a pregnancy warning, but the agency has denied these requests. The U.S. District Court of Massachusetts also dismissed several lawsuits, as the FDA would not support a label change, which would reinforce the plaintiffs’ arguments.

Despite the FDA’s position, the risks associated with Zofran are still not entirely clear. Some studies have suggested an unreasonable risk of harm to unborn children, while others have found no significant risk of birth defects. Moreover, GSK has paid settlements in the past, such as a health care fraud settlement in 2012, which included allegations of promoting off-label use of Zofran and paying kickbacks to physicians.

In addition to concerns about birth defects, Zofran has been linked to the risk of developing a specific type of dangerous heart arrhythmia called Torsades de Pointes. The FDA issued a warning in 2012 and advised against using the 32 mg intravenous dose due to this risk.

The changing landscape of regulations and warnings surrounding Zofran highlights the importance of staying up to date on the latest research and recommendations from regulatory authorities. While the drug has proven effective for its initial intended purposes, the potential risks associated with its use during pregnancy remain a subject of ongoing debate and investigation.

Settlements and Compensation

State-Level Settlements

State-level settlements involving Zofran lawsuits primarily revolve around the drug manufacturer GlaxoSmithKline (GSK) and their alleged off-label marketing of Zofran for morning sickness treatments; this use did not have FDA approval. In 2011, the Justice Department pursued legal action against GSK, resulting in GSK agreeing to pay a settlement of $3 billion to resolve the government’s claims related to Zofran and other drugs. This remains the largest settlement for alleged drug marketing violations in U.S. history.

Federal Cases

In federal cases, plaintiffs filed lawsuits against GSK for medical malpractice and the birth defects allegedly caused by off-label use of Zofran during pregnancy. The first Zofran-related federal lawsuit was filed on February 12, 2015, in the U.S. District Court, Eastern District of Pennsylvania, by Minnesota mother Cheri Flynn who sought compensation for two children born with serious heart abnormalities. Flynn was prescribed Zofran early in her first trimester of pregnancy to manage morning sickness. Other plaintiffs similarly filed lawsuits claiming their children experienced cleft palates and other birth defects due to the off-label treatment with Zofran.


Many of the federal Zofran lawsuits were consolidated into a multidistrict litigation (MDL) to handle the numerous state-law claims more efficiently. U.S. Circuit Judge William Kayatta of the First Circuit Court presided over the MDL and determined that expert testimony was insufficient to prove a causal relationship between Zofran and birth defects. Consequently, the court dismissed the majority of the cases in the MDL.

While the federal lawsuits did not result in large compensation for plaintiffs, the state-level settlements against GSK led to significant financial penalties for the company. GSK’s legal representation, Williams & Connolly, faced the challenge of defending against both the large state-level settlements and the individual lawsuits filed by affected families.

The subsequent litigation regarding Zofran has created a complex legal landscape involving state and federal jurisdictions, as well as numerous affected families and their attorneys. The outcome of these cases highlights the importance of accurate drug marketing and the need for continued investigation into the safety of off-label usage in pregnant women.

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