Deja.... do you know about the magnesium lotion? Magnesium also blocks the NMDA receptors in the periphery.

Morton Epsom lotion:
Many of us here use it with great success. It also relaxes muscles and improves circulation.

This is inexpensive and works wonderfully, it even lowers my hypertension to almost normal. I only need a small dose of betablocker now instead of 3 drugs.

Walmart and Walgreen's have it on the shelf...and it is at Amazon online... but not all stores have it yet.
Use about a quarter's diameter once a day...at night if possible.
Divide that up 1/2 for each leg. I find it lasts more than a day for me, so you can rotate locations. A fingertip dollop works for the neck.

http://www.walmart.com/ip/Morton-Uns...fl-oz/23711655