Evidence Desk Prompt • Adding supplements or a second medication to an SSRI: what did you check first?
Many members add magnesium glycinate, omega-3, vitamin D3, L-methylfolate, or rhodiola to an SSRI, and some are also on bupropion, buspirone, gabapentin or an estradiol patch. Before adding anything, consider: 1) Sodium: SSRIs can cause hyponatremia, especially in adults 60+, so ask about a sodium level (normal ~135-145 mEq/L) at baseline and again around week 2-4, particularly with adrenal conditions. 2) Bleeding: SSRIs plus NSAIDs or high-dose fish oil may raise bruising risk. 3) Serotonergic stacking: buspirone and rhodiola need pharmacist review. 4) Magnesium: the upper limit from supplements is 350 mg elemental per day. Discussion questions: What did your pharmacist flag? Which labs were drawn? Did you complete a psychiatric advance directive (crisis preferences, preferred contacts, medication notes)? Share your experience, not directives for others.
The sertraline and escitalopram DailyMed labels warn that SSRIs can cause hyponatremia (often reversible, with elderly patients at higher risk) and increase bleeding risk, especially with NSAIDs. The NIH ODS lists a 350 mg/day upper limit for supplemental magnesium for adults.