Hello,
I may can devise a pain relief formulation for you.
Do you want a to use/avoid any specific ingredients?
I may do a Prior Art Search to learn about new permeation enhancers already approved in order for the cream to act relatively faster. Or I may turn to look for a natural ingredient who might serve as a permeation enhancer.
The formula which I provide to you may not be patentable, as it may not meet all the patentability criteria (novelty, inventiveness, industrial application), nut nevertheless you may market it.
I may delay 1-2 weeks researching for updated means to make creams and ointments permeate the skin faster. After that, I may design the final formula in one more week.
If you have any comment or question, please let me know.
Best regards
Ruben
PD: I am a Chemical Engineer with a PhD in Chemistry and currently working as a consultant and a specialist for chemical inventions in my country's national Patent Office.