If vaginal dryness caused by menopause is a problem, then lubricants can help to make sexual intercourse more comfortable and enjoyable. This can help to boost libido.
If you are deficient in iron or vitamin D, which may be contributing to your low libido, over the counter supplements can help to bring your levels up to where they should be.
But you should go to a doctor who will help to pinpoint what is causing your low sex drive and treat you accordingly.