The Cost: $3 to $6 / tube. I use about 3 tubes a month.
A custom-ordered mix (Gabapentin, Ketamine, Lidocaine) designed for pain interruption. In my experience it works well, most times much better than the capaicin cream. On a side note, this stuff is great for stiff muscles too.
The Cost: $80 to $120 copay / tube. Each one lasts me about 2 months.
Also I have copay to see the doctor who prescribes it.