Risk of serotonin syndrome w/ serotonergic agents eg, SSRIs, SNRIs, TCAs (eg, clomipramine, amitriptyline), MAOIs (eg, moclobemide, linezolid), St. John's wort, triptans, tramadol, pethidine, tryptophan. Decreased plasma clearance w/ potent CYP1A2 inhibitors (eg, fluvoxamine). Increased AUC of CYP2D6 substrates (eg, desipramine, tolterodine). Potential increased risk of bleeding w/ oral anticoagulants or antiplatelet agents. Caution if co-administered w/ other centrally acting medicinal products or substances, including alcohol & sedative medicinal products (eg, benzodiazepines, morphinomimetics, antipsychotics, phenobarb, sedative antihistamines); medicinal products that are predominantly metabolised by CYP2D6 (eg, risperidone, nortriptyline, amitriptyline, imipramine) particularly those w/ narrow therapeutic index (eg, flecainide, propafenone, metoprolol). Lower plasma conc in smokers.