Many drugs can interact with duloxetine. Not all possible interactions are listed here. Tell your doctor about all your current medicines and any you start or stop using, especially:
any other antidepressant;
cimetidine;
St. John's wort;
theophylline;
tryptophan (sometimes called L-tryptophan);
an amphetamine - Adderall, Focalin, Vyvanse, Ritalin, Concerta, Strattera, and others;
an antibiotic - ciprofloxacin, enoxacin;
a blood thinner - warfarin, Coumadin, Jantoven;
heart rhythm medication - flecainide, propafenone, quinidine, and others;
opioid medicine - fentanyl, tramadol;
medicine to treat mood disorders, thought disorders, or mental illness - buspirone, lithium, thioridazine, and many others; or
migraine headache medicine - sumatriptan, rizatriptan, zolmitriptan, and others.
This list is not complete and many other drugs can interact with duloxetine. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Give a list of all your medicines to any healthcare provider who treats you.
 Cymbalta drug interactions (more detail)
