Hey I can speak from experience to try and answer this question.
I’ve been taking lisdexamfetamine (Vyvanse/Elvanse) since 2017. It has absolutely impacted my sex drive. Though, not in the way most might expect?
So achieving orgasm is actually easier for me (overall) when I’m medicated, but the drive to have sex as frequently as before has decreased. However, I don’t really think it’s by way of the medication actively depressing my sex drive, but rather because it’s no longer necessary for me to seek stimulation by way of having sex.
So, now, it’s easier to go without sex without feeling ravenous. More specifically, I considered myself to have a fairly insatiable sex drive before, but since becoming medicated I now seek it out about half as much.
My partner and I still engage in sex two or three times a week, and sometimes it’s more, rarely it’s less. For contrast, in a previous relationship (prior to diagnosis) my need was to initiate sex every single day.
If my partner initiates, it can take a little time for me to get into the groove, but the desire for sex is still functioning just fine. Maybe the best way I can put it is: ‘I could still eat, I just don’t feel like I’m starving anymore.’
I hope that gives you some insight. I’m happy to clarify or answer more if needed.