From what I understand, there is no problem using Erectile Dysfunction medications for ED. I am wondering if there is anything problematic about using a drug like Viagra for the purpose of extending cohabitation for pleasure (of either party).
Possible issues that come to mind are kishuy lada'as (intentionally arousing one's self) or overindulging in sexual matters, although I confess to not really know enough about the parameters of either topic. I also don't know very much about how ED drugs work.
On-point sources would be most appreciated.