Raman spectra showing some of the species present within a suspected counterfeit erectile dysfunction tablet. (jpg)

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Raman spectra showing some of the species present within a suspected counterfeit erectile dysfunction tablet.

Raman spectra showing some of the species present within a suspected counterfeit erectile dysfunction tablet. Sildenafil citrate and microcrystalline cellulose are present, as within the authentic tablet. An unknown, identified as calcium sulfate using Empty Modelling™ and the Renishaw Inorganic Material and Minerals Database, is not present in the authentic tablet and provides evidence it is counterfeit.

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