<p>Sulindac and its sulphide metabolite are highly protein bound. Patient should be monitored carefully until it is certain that no chance in their anticoagulant or hypoglycemic dosage is required. Aspirin has been shown to decrease the bioavailability of the active sulfide metabolite of sulindac. Prolonged concurrent use of Paracetamol with sulindac may increase the risk of adverse renal effects. That patient is under close medical supervision while receiving such combined therapy. Probenecid may increase the plasma concentration of sulindac and its sulfone metabolite and slightly decrease the plasma concentration of the active sulfide metabolite.</p>