Risk of serotonin syndrome w/ irreversible non-selective MAOIs; irreversible, selective MAO-B inhibitors (eg, selegiline, rasagiline); serotonergic medicinal products (eg, tramadol, sumatriptan & other triptans). Reversible, selective MAO-A inhibitor eg, moclobemide. Reversible, non-selective MAOI eg, linezolid. Higher AR incidence w/ St. John's wort-containing herbal remedies. Other medicinal products lowering seizure threshold eg, TCAs, SSRIs, SNRIs; neuroleptics (phenothiazines, thioxanthenes, butyrophenones), mefloquine, bupropion, tramadol. Concurrent electroconvulsive therapy (ECT). Increased exposure w/ strong CYP2D6 inhibitors eg, bupropion, quinidine, fluoxetine, paroxetine. Increased AUC w/ ketoconazole or fluconazole. May lead to increased exposure w/ strong CYP3A4 (eg, itraconazole, voriconazole, clarithromycin, telithromycin, nefazodone, conivaptan & HIV PIs) & CYP2C9 (eg, fluconazole, amiodarone) inhibitors, CYP2D6 poor metabolisers. Decreased AUC w/ CYP450 inducers (eg, rifampicin, carbamazepine, phenytoin). Alcohol (intake is not advisable during treatment). Potential increased risk of bleeding w/ oral anticoagulants or antiplatelets. Enhanced effects w/ lithium or tryptophan. False +ve results in urine enzyme immunoassays for methadone.