Plaintiffs in litigation challenging the efficacy of OTC drugs available under a Food and Drug Administration monograph can twist their arguments in innumerable ways but won’t overcome federal preemption of allegations of state law violations, a federal judge says.
False Advertising Challenges To OTC Phenylephrine Efficacy Ineffective Against Federal Preemption
Although FDA concluded OTC oral phenylephrine is ineffective as a nasal decongestant in doses up to highest studied level, federal preemption precludes challenges to agency’s regulation of labeling for phenylephrine and other Rx and OTC drugs, according to recent decision in New York federal court.

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Although FDA concluded OTC oral phenylephrine is ineffective as a nasal decongestant in doses up to highest studied level, federal preemption precludes challenges to agency’s regulation of labeling for phenylephrine and other Rx and OTC drugs, according to recent decision in New York federal court.
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