I've made this mistake - I thought I was alternating between paracetamol and ibuprofen preparations, but I'd accidentally used a paracetamol-containing version

I've made this mistake - I thought I was alternating between paracetamol and ibuprofen preparations, but I'd accidentally used a paracetamol-containing version of the second product. Fortunately it was a manageable acute/one-off dose for my body weight (8g/24hrs - the A and E doctor ran a blood paracetamol level test as a precaution, but they didn't expect any issues), but it's an easy mistake to make.