On Amazon it has a return policy if not satisfied -
[Penetrex is 100% Unconditionally Guaranteed and that policy has NO TIME LIMIT. If Penetrex does not meet your expectations simply send it back to Biomax and we'll credit you in full for the original amount of your purchase price as well the expense you incur sending it back to us via 1st Class Mail. ]
http://www.amazon.com/Penetrex%C2%AE...P3EBNX8X22XJN0

so does this one-
NERVANA - Pain Relief Cream
[The Protege Promise: Your SATISFACTION

If you are not completely satisfied with NERVANA, contact us within 365 days of purchase, and we will issue a complete refund. No Questions Asked

Don't Procrastinate, Take Your Pains to NERVANA and Feel Better!

Our Supplies Run Out Fast. Stop Your Suffering with NERVANA and order a jar RISK FREE of this Revolutionary Pain Relief Cream Now!

SUPER DEAL! Get 2 Jars of NERVANA for only $40. Enter code 4M95BZEP at checkout.]
http://www.amazon.com/dp/B00KSEAXUU?psc=1



You can do a test and report back..

We have some Penetrex but haven't used it for nerve pain, just aches & muscle pain...