Thought I'd add a belated two cents worth.
I have learned through the years that many things affect libido. While none of the medication I have taken (Vicoden, Loritab, Oxycodone) have never affected my drive, I have found other things that do. Extreme pain, Depression, are at the top of that list. The days I don't feel "pretty", no ammount of verbal flattery can shake that feeling, and frequently my depression steps in to sabotage attemps from those in my life.
Currently not having trust in my boyfriend has led to a serious decrease in any sort of affection, even hugs. The fact that he does not seem motivated to make ammends does not help.
Also I've found when my pain flares bad I don't want anything but for the hurting to stop. The pain gets so bad I can't block it in any way, even with meds. I'll get my back rubbed, and gently held (avoiding my arm due to extreme sensitivity) but otherwise that's about it.
Things that help are talking to your doctor about what's going on. If you're post menapusal perhaps hormone replacement therapy. I'm perio-menapausel, but part of that is due to the daily birth control I take to regulate my hormones down. You see, I'm allergic to elevated levels of estrogen. Yes, I'm allergic to being a girl. Also you can do a little research to discover other ways to help bolster your libedo levels.
Also having an understanding partner helps. Someone who will take the time that your body needs to help awaken it. The act is supposed to be gentle and sharing, something enjoyable. And of course there are ways to be close without haveing to complete the act.
I was raised in an open house, where this topic was not taboo, and I have no quams with discussing it with any who have questions. I believe in being comfortable in my skin and who and what I am. I may not be content with my current condition (CRPS) and I may wish that the packaging were about 10 pounds lighter (darned winter weight!) but it does not change the fact that knowledge is something to be shared, not hoarded. And if the stuff in my head can help someone else, then by all means, feel free to ask me anything.