Onfi Lawyers

Our lawyers are investigating claims against Onfi for patients who developed Stevens-Johnson Syndrome or Toxic Epidermal Necrolysis after taking Onfi.

O’Steen MacLeod Combs PLC is recognized by Best Lawyers as one of the top law firms in America. Our firm was designated as a Tier 1 law firm in Personal Injury Litigation in the organization’s “Best Law Firms” rankings for 2025.

For more than 50 years, our lawyers have assisted victims of medical malpractice receive everything they deserve for their losses.
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Onfi Warning
FDA Warning Links Onfi to Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis
December 3, 2013—The Federal Food and Drug Administration (FDA) warned of serious skin reactions associated with Onfi (clobazam) and announced labeling changes reflecting these side effects. The FDA reported that people taking Onfi are at risk of developing Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis.
The incidence of Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis is most prevalent during the first eight week of treatment or when the medication is stopped and then resumed. The labeling for FDA has been changed to identify these serious side effects.
About Onfi
Onfi belongs to a class of drugs known as benzodiazepines which used in conjunction with other medications to treat seizures in people diagnosed with Lennox-Gastaut Syndrome, a severe form of epilepsy. Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis generally are not associated with benzodiazepines.
If you have experienced serious skin reactions after taking Onfi, including developing a rash, blistering or peeling of the skin, mouth sores or hives, promptly consult your physician for an evaluation.
If you have developed Stevens-Johnson Syndrome or Toxic Epidermal Necrolysis after taking Onfi, you may be entitled to compensation. You should act immediately to contact an attorney experienced in matters involving defective pharmaceuticals.
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