I can't tell you lately wheather they are unsplittable as i havn't seen them, but just in case they are could someone please leave the link to Erowid on 'Coldwater extraction' currently im unable to find it.
Once again this link will only help you with Nurofen + or pills that only have ingredients of Ibprofen and codiene. This is because paracetamol can also dissolve in water.
Just one more note, if u can convince the chemist that u need a 74 pack these should have been on the shelf long enough not to have been restocked, thus still splitable.
When I highsided my motocycle the chemist had no problem giving me a pack that size as he could see from the lack of skin on my hands i needed them.
Goodluck and look around
www.erowid.org when u get sumtime aswell