Yeah, don't take paracetamol if your liver is already busy getting rid of the alcohol. However, both alcohol and ibuprofen increase the risk of stomach bleeding, so don't overdo it with ibuprofen either. I'm sometimes shocked how nonchalantly people mix residual alcohol with drugs without checking side effects.

PS: Paracetamol is a drug with pretty low side effects, but the dosage is really important. Even just doubling or tripling the dose can cause acute liver failure.