Glyceryl trinitrate?: My apologies but you're asking about a malaysian drug on a us based website. Does gtn mean glyceryl trinitrate? If so, it shouldn't cause impotence or erectile dysfunction. However, the need for taking it may cause impotence. In other words, inadequate blood flow to heart leads to chest pain. Gtn helps restore blood flow to heart. Inadequate blood flow could also be cause of erectile dysfunction.
Answered 9/28/2016
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