There are some dates in the Belfast Telegraph article, but I must have misread something, since I thought she died only a couple of days after she took the pills, but reading it again, it says that she took the pills on the 19th and 20th, and died on the 25th, which is actually consistent with some of the details in the Wikipedia entry.
It still seems that she was very unlucky, but it will however make me even more paranoid about using paracetamol.
Paracetamol is clearly fairly iffy from an OD point of view, Aspirin is I think harder to OD on, but can cause problem if you've got stomach ulcers, does anyone know how dodgy is Ibuprofen is? It seems to be the least problematic of the easily available analgesics.