p24 doesn't offer Hydrocodone. They offer dihydrocodeine, but not hydrocodone. 2 very different medications. Hydrocodone is a much stronger pain med, and I have never seen it offered at any EU pharmacies or pharmacies that are willing to ship to EU.
The only U.S places that offer it, can only offer it with a doctor's prescription since it is a controlled medication in the U.S - So it is unlikely that any of these consultation pharmacies would be willing to ship a prescription-only medication overseas. I can't say that I know what would be the best method to obtain hydrocodone if you are in EU. There really aren't any reliable methods, that I can think of. Hydrocodone isn't used much except in the U.S - Most EU countries (and most of the rest of the world actually) - use morphine as the standard 'strong pain killer', right? Whereas - in the U.S - the synthetics hydrocodone and oxycodone are sort of the 'standards' in strong pain killers.