Additive pharmacologic effect w/ benzodiazepines. Serotonin syndrome w/ serotonergic drugs eg, SSRIs, SNRIs, TCAs, triptans, 5-HT
3 receptor antagonists, mirtazapine, trazodone, tramadol, MAOIs. Increased activity of coumarin anticoagulant. Potentiated effect of alcohol & other central depressive drugs.