Viagra operates by increasing the levels of cGMP in target cells. This same mechanism underlies a newly discovered action of the drug in mouse hearts: counteracting hypertrophy (pages 214–222).
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Mendelsohn, M. Viagra: now mending hearts. Nat Med 11, 115–116 (2005). https://doi.org/10.1038/nm0205-115
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DOI: https://doi.org/10.1038/nm0205-115
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