Cilostazol and Sertraline: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jul 2, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Cilostazol
Sertraline
No brand names on record
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
Taking cilostazol (Pletal) and sertraline together can add up to a higher chance of bleeding or bruising. Cilostazol keeps your platelets from sticking together, which helps blood flow. Sertraline, an antidepressant, can make platelets a little less able to form clots because it changes how they use a chemical called serotonin. Put together, these two nudge your body in the same direction, so you may bruise more easily or notice bleeding.
This is a caution, not a reason to panic. Watch for things like nosebleeds, easy bruising, or bleeding that is slow to stop, and let your care team know. Your pharmacist and doctor can keep an eye on this and manage it. Please don't stop either medicine on your own.
Effect: Additive risk of bleeding when the antiplatelet cilostazol is combined with the SSRI sertraline.
Mechanism: Pharmacodynamic, not pharmacokinetic. Cilostazol inhibits platelet aggregation; sertraline depletes platelet serotonin stores and impairs serotonin-mediated platelet activation. Combined effect impairs hemostasis. Neither agent is metabolically dependent on the other here.
- Direction: Increased bleeding risk (additive)
- Onset: Unspecified
- Evidence: Theoretical, supported by case-control/cohort data with SSRIs plus antiplatelets
- Severity: Major
Management: Monitor for epistaxis, ecchymosis, hematoma, petechiae, and GI or serious hemorrhage. Counsel the patient on bleeding signs. Dosing may be individualized and monitoring intensified by the care team.
What happens
An increased risk of bleeding
Interaction Deep Dive
Take care when giving a SSRI together with an antiplatelet drug, since the combination can raise the likelihood of bleeding episodes32. Using sertraline alongside an antiplatelet agent may heighten the bleeding risk, an effect potentially attributable to how sertraline influences platelet serotonin release. Both case-control and cohort investigations have linked the joint use of selective serotonin and norepinephrine reuptake inhibitors (sertraline among them) with antiplatelet agents to a greater bleeding risk. The bleeding events that have been documented range from epistaxis, ecchymosis, hematoma, and petechiae to life-threatening hemorrhages. During concurrent administration of sertraline and an antiplatelet agent, watch the patient for indications of heightened bleeding and warn patients about the elevated bleeding risk 1.
Why it happens (mechanism)
Release of serotonin by platelets; additive effects on hemostasis
How to manage this interaction
The good news: this is manageable with awareness and monitoring. Keep taking both medicines exactly as prescribed unless your prescriber tells you otherwise.
- Watch for bleeding signs: nosebleeds, unusual bruising, small red spots on the skin, or bleeding that won't stop.
- Report right away any black or bloody stools, vomiting blood, or bleeding you can't control, as these need urgent attention.
- Your care team may monitor you more closely and can adjust or individualize your treatment if needed.
- Ask your pharmacist before adding aspirin, ibuprofen, naproxen, or other blood thinners, which can raise the risk further.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
3 reports — tap to read
a) A retrospective study involving patients older than 50 years who were diagnosed with acute myocardial infarction (N=27,058) found that SSRI use together with any antiplatelet therapy raised bleeding risk significantly, by 1.42-fold, when compared with aspirin used on its own. The combination of aspirin, clopidogrel, and an SSRI significantly raised risk by 2.35-fold relative to aspirin alone and by 1.57-fold relative to clopidogrel plus aspirin combination therapy 2.
b) A systematic review and meta-analysis covering 22 observational studies found that SSRI use was linked to a significant 1.55-fold rise in the risk of upper gastrointestinal bleeding (UGIB). Using SSRIs together with antiplatelet drugs was linked to a 2.48-fold rise in the risk of UGIB (3 studies) 3.
c) Case reports along with epidemiological studies (both case-control and cohort designs) have shown a link between the use of agents that disrupt serotonin reuptake and the occurrence of gastrointestinal bleeding. Drawing on data from published observational studies, exposure to SSRIs, particularly during the month prior to delivery, has been linked to a less than 2-fold rise in the risk of postpartum hemorrhage. Bleeding events associated with SSRIs and SNRIs have spanned from ecchymosis, hematoma, epistaxis, and petechiae to life-threatening hemorrhages 1.
Common questions
Can I take Cilostazol and Sertraline together?
Using cilostazol and sertraline together can add up to a higher bleeding risk, so watch for bruising or bleeding and report it, but keep taking both as prescribed unless your care team says otherwise. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Cilostazol and Sertraline interaction?
It is rated major. Potentially serious — often needs a change or close monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Cilostazol and Sertraline interaction managed?
The good news: this is manageable with awareness and monitoring. Keep taking both medicines exactly as prescribed unless your prescriber tells you otherwise. Watch for bleeding signs: nosebleeds, unusual bruising, small red spots on the skin, or bleeding that won't stop. Report right away any black or bloody stools, vomiting blood, or bleeding you can't control, as these need urgent attention. You… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Cilostazol or Sertraline need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there a safer alternative to one of these medications for me?
References (3)
- Product Information: ZOLOFT oral tablets, oral solution, sertraline hydrochloride oral tablets, oral solution. Viatris Specialty LLC (per FDA), Morgantown, WV, 2023. DailyMed
- Labos C, Dasgupta K, Nedjar H, et al: Risk of bleeding associated with combined use of selective serotonin reuptake inhibitors and antiplatelet therapy following acute myocardial infarction. CMAJ 2011; 183(16):1835-1843. PubMed
- Jiang HY, Chen HZ, Hu XJ, et al: Use of selective serotonin reuptake inhibitors and risk of upper gastrointestinal bleeding: a systematic review and meta-analysis. Clin Gastroenterol Hepatol 2015; 13(1):42-50. PubMed
Keep reading about Cilostazol
Keep reading about Sertraline
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