> Strong CYP2D6 Inhibitors* Paxil (paroxetine) > Prozac (fluoxetine) > Wellbutrin (bupropion) > Moderate CYP2D6 Inhibitors Cymbalta (duloxetine) > Zoloft (sertraline) > Weak CYP2D6 Inhibitors Celexa (citalopram) > Effexor (venlafaxine) > Lexapro (escitalopram) Source: Abbreviated listing from Handbook of Essential Psychopharmacology, second edition, 2005 *To be avoided with tamoxifen