Hi, I'm really sorry that your suffering so much atm, to consider this, but no.. I really don't think it would be fatal. zapain / cocodamol is a European version of Tylenol w/ codeine #3. Except its got more Tylenol (acetaminophen aka paracetamol).-500mg per tab.. T3's have 300mg. But anyhow. the max daily dose of Tylenol was 4,000mg per day. in 2008 a study reviled it was actually a dangerously high dose and had been responsible for many mysterious medical cases. so it was lowered to 2,000mg/day.. Overdosing on that much Tylenol (paracetamol) is more dangerous Imo than the codeine. Its really unpleasant to overdose on, and it really does a number to the liver. However, you can extract the codeine using cold water (look up CWE/cold water extraction), but even when u have pure codeine, I wouldn't mix it with so much Zoloft. its Imo not fatal and could be risky in other way, like possible perm. damages or hospitalization