My painkiller of choice is aspirin. It's the nearest thing I have to a natural remedy.
Hundreds of years old maybe more and an extract from Willow bark.
It is amazingly cheap I can buy 12 tablets for about a dollar fifty in the supermarket.
That's why it is so hard to find in some places. In the US it is cheap but there is only one SKU - in Singapore The Guardian Pharmacy simply didn't sell aspirin.
There was aspirin mixed with glycine I think for about $9 a dozen cap capsules. And the aspirin was only 100 mg. And in the US that was selling low dose aspirin - tablets with a quarter of the active ingredient - to prevent heart disease at twice the price of regular.
It seems that if you want a painkiller they want you to spend huge amounts of money on ingredients that you don't know or understand. That's the world we live in.