Probenecid causes an almost two-fold reduction in clearance of paracetamol by inhibiting its conjugation with glucuronic acid. A reduction in the paracetamol dose should be considered if it is to be used concomitantly with probenecid.
Salicylamide may prolong the elimination half-life of paracetamol.
Caution should be taken with the concomitant intake of enzyme-inducing substances (see Overdosage).
Concomitant use of paracetamol (4 000 mg per day for at least 4 days) with oral anticoagulants may lead to slight variations of INR values. In this case, increased monitoring of INR values should be conducted during the period of concomitant use as well as for 1 week after paracetamol treatment has been discontinued.