Lidocaine patches are ridiculously expensive and yet ridiculously easy to make – here’s how.
1) Get your doctor to prescribe 100 gm lidocaine HCl powder – you can get it from a compounding pharmacy though many pharmacies can order it in. (Note: – DO NOT get not lidocaine base which has zero solubility). One teaspoon of powder lidocaine HCl is 2.4 gms.
2)To make a 5% lidocaine mix:
Take 1 packet Knox gelatin
2/3 cup water = 160 ml
3 1/3 (3.333) teaspoons lidocaine HCl powder = 8 gms
3) Heat up water to boil
4) Put in whole packet Knox gelatin and lidocaine powder
5) Put tinfoil flat out in some sort of cooking pan.
6) pour gelatin mix over tinfoil and it form a thin layer – allow to cool off – may needs some time to get dry enough to be tacky.
7) When tacky, will self-stick. – Size the patch by cut the tinfoil to pain area you wish to cover and you are good to go. If used overnight, might want to tape it down some.
Comment – 5% lidocaine is what the commercial Xyloderm patches are. 10% patches might be better (double the lidocaine dose to 6 2/3 teaspoons). Theoretically you can go up to 60% with lidocaine but lidocaine is acidic and that might cause some irritation.(Though one might add some baking soda but if too much baking soda becomes the inert lidocaine base.
NOTE – By mouth, lidocaine is a poison and your doctor might want you to sign a waver to the effect you understand that and will not take by mouth. Having said that, most pill-bottles full of meds could be toxic if taken all, in quantity. Topically however, they do not amount to anything – no blood levels.