SSRIs and Supplement Interaction Cautions

SSRIs (selective serotonin reuptake inhibitors) are among the most commonly prescribed antidepressants, and several of their own FDA labels name specific interaction cautions with other medications and supplements. Two mechanisms come up repeatedly: an added bleeding risk when combined with drugs that also affect clotting or platelet function, and a serotonin-related caution when combined with other serotonergic substances.

Documented bleeding-risk findings

• Sertraline + warfarin (caution, high evidence) -- warfarin's own FDA label names serotonin reuptake inhibitors directly in its table of drugs that can increase bleeding risk.
• Sertraline + NSAIDs -- sertraline's FDA label has a dedicated "Increased Risk of Bleeding" section that names NSAIDs (like ibuprofen and aspirin), aspirin, other antiplatelet drugs, warfarin, and other anticoagulants together as adding to this risk. This is a drug-class-level caution stated on sertraline's own label, not specific to one NSAID.

Serotonergic-supplement caution: St. John's Wort

St. John's Wort is one of the few supplements with a documented interaction against an SSRI in our reviewed catalog -- sertraline + St. John's Wort -- sourced from NCCIH's own St. John's Wort page, which discusses interactions with antidepressants generally. St. John's Wort is also independently documented (St. John's Wort + warfarin) as reducing the effectiveness of a range of other medications by inducing liver enzymes that clear them faster -- a real, separate concern for anyone on any prescription medication, not only SSRIs.

Why this matters for newer SSRIs too

Other SSRIs share sertraline's general drug class and often carry similar class-level cautions on their own labels, but the specific wording, drugs named, and evidence strength can differ from one SSRI's label to another. This site reviews and publishes each SSRI's pairs individually rather than assuming one SSRI's finding automatically applies to another -- check the specific medication you take rather than generalizing from a different SSRI.

What to do

Never stop or change an antidepressant dose based on this site. Check your specific combination and bring any bleeding-risk or serotonergic-supplement questions to the prescriber managing your antidepressant, especially before starting an herbal supplement like St. John's Wort.

See Medication Safety for more medication-focused guidance.