Case Study Suggests Even Low-Dose Risperdal Side Effects May Cause Tardive Dyskinesia Movement Disorders
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Risperdal Safety Data for Kids Was Manipulated by Drug Maker, Former FDA Director Testifies August 27, 2015 Irvin Jackson Add Your CommentsA former head of the FDA indicates that Johnson & Johnson’s Janssen subsidiary manipulated data involving the potential safety of Risperdal for kids, in testimony stemming from lawsuits over unnatural breast growth among young boys using the antipsychotic medication.ย Dr. David Kessler, commissioner of the FDA from 1990 to 1997, recently filed a report in the litigation that claims Janssen controlled and influenced the findings of a 2003 study that looked at the potential side effects of Risperdal on children, concluding that there is no direct correlation between prolactin elevation caused by Risperdal and breast development among boys, which is known as gynecomastia.Kessler and some others involved with the study indicate that those conclusions were misleading or outright lies. In truth, they say that the data showed a significant increase in the risk of gynecomastia with Risperdal use among young boys, but that information was left out when the study was edited by Janssen employees.Do You Know about…Spinal Cord Stimulator lawsuitsSpinal cord stimulator lawsuits are being investigated for individuals who suffered unnecessary shocks, burns or other problems, often resulting in the need for additional surgery to remove the SCS.Learn MoreSEE IF YOU QUALIFY FOR COMPENSATIONDo You Know AboutโฆSpinal Cord Stimulator lawsuitsSpinal cord stimulator lawsuits are being investigated for individuals who suffered unnecessary shocks, burns or other problems, often resulting in the need for additional surgery to remove the SCS.Learn MoreSEE IF YOU QUALIFY FOR COMPENSATIONThe revelations came as a result of the continuing Risperdal litigation brought against Johnson & Johnson by families and young males who have been diagnosed with gynecomastia after using the medication. About 1,300 claims are currently pending in Pennsylvania state court, alleging that the drug company failed to adequately warn users or the medical community about the risks associated with using the drug by males when they are children.The study at issue was published in the Journal of Clinical Psychiatry in 2003. It was co-authored by Janssen employees and the top pediatrician at Canada’s SickKids hospital, Dr. Dennis Daneman.According to Kessler, who is also a pediatrician, the company manipulated more than 40 manuscripts, and Daneman has testified as well, saying that the study understated Risperdal side effects. However, he notes that the manipulation of the data occurred outside of his own involvement.Last yearm a class action lawsuit was filed against the Johnson & Johnson unit over its alleged clinical trial data manipulation, which accuses the company of downplaying Risperdal risks and ghostwriting medical articles in support of the drug without revealing the connections to the company.Daneman and another author involved in the study, Robert Findling, are having the data reanalyzed by an independent biostatistician, indicating that they will decide whether to issue a full retraction or corrections based on those findings.Johnson & Johnson has been quietly dealing with breast growth lawsuits over Risperdal for years, but the number of cases has continued to grow as more families and young adults learn that there may be a link between problems suffered following a diagnosis of gynecomastia and Risperdal use as a child.In February 2015, the first Risperdal bellwether trial in Pennsylvania ended in a $2.5 million jury award, with a second case the following month ending with a defense verdict. While that second jury found that the plaintiff failed to establish that his abnormal breast growth was caused by the medication, the same jury determined that Johnson & Johnson failed to adequately warn the boys and their parents about the gynecomastia risks. A third bellwether case was settled out of court in May.While the outcomes of the cases are not binding on other claims, they are being closely watched by lawyers involved in the litigation, as they may influence negotiations to reach Risperdal gynecomastia settlements that would avoid the need for hundreds of individual trials to be scheduled. Written by: Irvin JacksonSenior Legal Journalist & Contributing EditorIrvin Jackson is a senior investigative reporter at AboutLawsuits.com with more than 30 years of experience covering mass tort litigation, environmental policy, and consumer safety. He previously served as Associate Editor at Inside the EPA and contributes original reporting on product liability lawsuits, regulatory failures, and nationwide litigation trends. Tags: Clinical Trials, Gynecomastia, Johnson & Johnson, Male Breast Growth, Risperdal Image Credit: |More Risperdal Lawsuit Stories Risperdal Side Effects Led to Deadly Breast Cancer, Lawsuit Claims January 7, 2026 Court Considers Remanding Risperdal Breast Cancer Lawsuit to California State Court October 29, 2025 Case Study Suggests Even Low-Dose Risperdal Side Effects May Cause Tardive Dyskinesia Movement Disorders December 14, 2022 0 Comments LinkedInThis field is for validation purposes and should be left unchanged.Share Your CommentsFirst Name*Last NameEmail* Shared Comments*This field is hidden when viewing the formI authorize the above comments be posted on this page Yes NoPost Comment I authorize the above comments be posted on this pageWeekly Digest Opt-In Yes, send me a weekly email with the latest lawsuits, recalls and warnings.Want your comments reviewed by a lawyer?To have an attorney review your comments and contact you about a potential case, provide your contact information below. This will not be published.Contact Phone #Alt Phone #Private CommentsNOTE: Providing information for review by an attorney does not form an attorney-client relationship.CAPTCHAGA SourceGA CampaignGA MediumGA ContentGA TermΔ MORE TOP STORIES Pesticide Parkinson’s Disease Lawsuit Filed Against Chlorpyrifos Manufacturers (Posted: today)A man’s lawsuit blames pesticides for his development of Parkinson’s disease after living near nurseries in California for nearly 20 years.MORE ABOUT: CHLORPYRIFOS PARKINSONโS DISEASE LAWSUITChlorpyrifos Pesticide Exposure Detected in Infants, Raising New Neurotoxicity Concerns (11/03/2026)Chlorpyrifos Ban Takes Effect Across EU as Studies Link Pesticide Exposure to Parkinsonโs Disease (10/01/2026)Parkinson’s Disease Lawsuit Filed Against Chlorpyrifos Manufacturers (09/23/2026) Olympus Wrongful Death Lawsuit Judge Calls for Quick Resolution (Posted: yesterday)A wrongful death lawsuit filed against Olympus Medical over an alleged medical scope infection could be ready for trial in about a year.MORE ABOUT: SCOPE INFECTION LAWSUITOlympus Scope Problems Lead to FDA Import Warning (10/27/2026)Fujifilm and Olympus Scope Infection Risks Highlight Growing Need for Advanced Disinfection Systems: Report (10/19/2026)Olympus Medical Device Warning Letter Follows FDA Inspections of Six Manufacturing Facilities (10/16/2026) Lawyers Outline Process for Settling Bard PowerPort Lawsuits After Bellwether Trials (Posted: 2 days ago)Attorneys in Bard PowerPort lawsuits have asked a federal judge to suspend pretrial proceedings while the parties engage in settlement negotiations seeking to resolve the litigation.MORE ABOUT: BARD POWERPORT LAWSUITBard PowerPort Infection Lawsuit Claims Catheter Fractures Harbored Bacteria (11/03/2026)Fourth Bard PowerPort Bellwether Case Set for Trial Dec. 1, as Third Gets Underway (10/14/2026)Judge Clears Bard PowerPort Lawsuit for Trial, Rejecting Motion for Summary Judgment (10/02/2026)
Case Study Suggests Even Low-Dose Risperdal Side Effects May Cause Tardive Dyskinesia Movement Disorders December 14, 2022
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