Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Other medications can affect the removal of lithium from your body, which may affect how lithium works. Examples include ACE inhibitors (such as captopril, enalapril), ARBs (such as losartan, valsartan), NSAIDs (such as celecoxib, ibuprofen), "water pills" (diuretics such as hydrochlorothiazide, furosemide), other drugs for mental/mood conditions (such as chlorpromazine, haloperidol, thiothixene), among others. Your doctor may need to adjust your dose of lithium if you are on these medications.

The risk of serotonin syndrome/toxicity increases if you are also taking other drugs that increase serotonin. Some examples are street drugs such as MDMA/"ecstasy," St. John's wort, certain antidepressants (such as SSRIs like fluoxetine/paroxetine, SNRIs like duloxetine/venlafaxine), among others. The risk of serotonin syndrome/toxicity may be more likely when you start or increase the dose of these drugs.

Eat a normal diet with an average amount of sodium. Ask your doctor or dietician for more details.