You can buy 32x12.8mg codeine/200mg ibuprofen for ~6 quid at boots. While large amounts of ibuprofen aren't great for your stomach they won't kill you as fast

You can buy 32x12.8mg codeine/200mg ibuprofen for ~6 quid at boots. While large amounts of ibuprofen aren't great for your stomach they won't kill you as fast as paracetamol. All that assumes you aren't doing a cold water extraction.