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February 4, 2004

Sex, Lies, and Niagra

JAMA. 2004;291(5):560-562. doi:10.1001/jama.291.5.560-c

To the Editor: An estimated 20 million men worldwide have been prescribed sildenafil for erectile dysfunction, and there is a growing market in "natural" alternatives.1 We analyzed the chemical content of one such product, Actra-Rx, which has been advertised as "100% natural."2-6

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