Here is just one list of drugs that cause PN:

http://peripheralneuropathycenter.uc...ic/drugs.shtml

There are many lists on the net and depending on the date published may show slight variances. For some reason the fluoroquinolones and statins are typically ignored still on listings.

So I don't think using phenytoin in a compounded cream is wise.

Many people including myself find capsaicin intolerable. Just keep that in mind. Side effects listings for capsaicin include burning pain and red skin.

Understanding what livedo is would help in trying another path topically to reduce it. Livedo is a temporary constriction of blood vessels and reduction in the circulation where it appears. So given that hint, trying topical magnesium may help. Some pain is ischemic, and if that is your case using magnesium will improve circulation where it is applied. Magnesium dilates blood vessels and improves circulation, and also acts on the NMDA pain receptors to block pain signals. So it is very useful for pain too.

Our nice lotion by Morton's was discontinued recently but many of us stocked on up it and still use it. This is very unfortunate because it really works well for some of us.
Alternative topicals are RX (your doctor can order a compounded cream with magnesium in it), or you can buy OTC the Kirkland one:

http://www.kirkmangroup.com/magnesiu...3-gm-4-oz.html

Oral magnesium may not get thru the area with decreased blood flow, so using a topical bypasses that.
Some magnesium is absorbed from epsom salts, so soaking in LUKEWARM water that covers the thighs may help too. Before bedtime is especially relaxing to the whole body as well.

MP can arise from wearing too tight blue jeans or pants, tight belts with or without heavy tools attached, medical procedures like a bone marrow biopsy, abdominal surgery (my trigger), diabetic PN, or injury to the lumbar spine, girdles or compression of the lower stomach area by tumors or trauma.