Ginkgo biloba

<h3> Absolute Contraindications of Ginkgo biloba </h3> <h4> Active bleeding or known bleeding disorder (e.g., hemophilia) [You have an ongoing bleeding problem]</h4> <ul> <li> 🩸 <li> Recommendation: Do not take Ginkgo until bleeding is controlled and you have discussed it with your doctor. <li> Reasoning: Ginkgo components have been temporally associated with bleeding events; given any existing bleeding disorder the herb could worsen bleeding or complicate management. <li> Scientific_Study_Title: Spontaneous bleeding associated with ginkgo biloba: a case report and systematic review of the literature. <li> Scientific_Study_Authors: Bent S, Goldberg H, Padula A, Avins AL <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/16050865/ <li> Scientific_Study_Excerpt: <p>Summary: This paper collected published case reports linking Ginkgo use with bleeding events, including intracranial hemorrhage in some cases. Although many reports also involved other bleeding risk factors, the authors concluded there is a possible causal association and advised caution for patients with bleeding risks. The review recommended counseling patients using Ginkgo about a potential increase in bleeding risk and urged further study to define causality and mechanisms.</p> </ul> <h4> Concurrent warfarin (or other vitamin-K antagonist) therapy [You use warfarin]</h4> <ul> <li> 🧪 <li> Recommendation: Avoid starting Ginkgo while on warfarin; if already using both, consult the prescriber and consider stopping Ginkgo under medical guidance. <li> Reasoning: Large-scale clinical-record analyses show an increased hazard of bleeding when Ginkgo is taken concurrently with warfarin; mechanisms may include both platelet/hemostasis effects and variable effects on drug metabolism. <li> Scientific_Study_Title: Ginkgo and Warfarin Interaction in a Large Veterans Administration Population. <li> Scientific_Study_Authors: Stoddard GJ, Archer M, Shane-McWhorter L, Bray BE, Redd DF, Proulx J, Zeng-Treitler Q <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/26958257/ <li> Scientific_Study_Excerpt: <p>Summary: In a large Veterans Administration electronic-health-record analysis, concurrent Ginkgo use with warfarin was associated with a significantly higher risk of bleeding (hazard ratio ≈1.38). The authors used automated extraction of Ginkgo use from records and linked it to prescription and outcome data; while observational and subject to confounding, this large-scale analysis supports a clinically meaningful association that merits caution and clinician awareness.</p> </ul> <h4> Pregnancy and breastfeeding [Pregnant or nursing]</h4> <ul> <li> 🤰 <li> Recommendation: Avoid Ginkgo during pregnancy and breastfeeding; discuss any exposure with your clinician. <li> Reasoning: There is insufficient human safety data and some animal/in vitro evidence suggests antiplatelet activity that could increase bleeding during delivery; lactation safety is unknown. <li> Scientific_Study_Title: Safety and efficacy of ginkgo (Ginkgo biloba) during pregnancy and lactation. <li> Scientific_Study_Authors: Dugoua JJ, Mills E, Perri D, Koren G <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/17085776/ <li> Scientific_Study_Excerpt: <p>Summary: This systematic review found weak animal/in vitro evidence of antiplatelet activity and limited human data. The review concluded Ginkgo should be used cautiously in pregnancy-particularly around labor because of potential bleeding risks-and avoided during breastfeeding until safety is demonstrated by high-quality human studies.</p> </ul> <h4> Known epilepsy or seizure disorder [You have seizures or are prone to them]</h4> <ul> <li> ⚡ <li> Recommendation: Do not take Ginkgo without specialist advice; generally avoid if you have epilepsy. <li> Reasoning: Case reports describe seizure recurrence or new seizures after starting Ginkgo extracts or after eating ginkgo seeds; some Ginkgo constituents (ginkgotoxin) can reduce vitamin B6 activity and lower seizure threshold. <li> Scientific_Study_Title: Ginkgo biloba precipitating epileptic seizures. <li> Scientific_Study_Authors: Granger AS <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/11742783/ <li> Scientific_Study_Excerpt: <p>Summary: The case report described two patients with previously controlled epilepsy who experienced recurrent seizures within two weeks of starting Ginkgo extract; seizures resolved after stopping the herb. The author highlights that Ginkgo may precipitate seizures in susceptible persons and recommends caution in epileptic patients.</p> </ul> <h3> Relative Contraindications of Ginkgo biloba </h3> <h4> Use with antiplatelet agents (aspirin, clopidogrel) or other anticoagulants (DOACs) [You take drugs that thin blood]</h4> <ul> <li> ⚖️ <li> Recommendation: Use only after medical review; many clinicians advise avoiding combination or monitoring closely for bleeding. <li> Reasoning: Pharmacodynamic studies and observational data show Ginkgo can potentiate bleeding time or have additive antiplatelet effects with agents such as aspirin, cilostazol, or clopidogrel, though randomized trials show mixed results-risk appears increased in some settings. <li> Scientific_Study_Title: Pharmacodynamic interaction studies of Ginkgo biloba with cilostazol and clopidogrel in healthy human subjects. <li> Scientific_Study_Authors: Izzo AA, Ernst E, et al. (study citation: British Journal of Clinical Pharmacology, 2007) <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/17010102/ <li> Scientific_Study_Excerpt: <p>Summary: In a randomized crossover study in healthy volunteers, coadministration of Ginkgo with cilostazol or clopidogrel did not significantly change aggregation in vitro but did potentiate bleeding-time prolongation when combined with cilostazol. The trial highlights that interactions can affect bleeding time even when platelet aggregation measures are not consistently altered-clinically relevant when combined with antiplatelet therapy.</p> </ul> <h4> Use with selective serotonin reuptake inhibitors (SSRIs) or other serotonergic drugs [You take antidepressants]</h4> <ul> <li> 🧠 <li> Recommendation: Discuss with your prescriber before combining; monitor for unusual bleeding (gums, bruising) and other adverse effects. <li> Reasoning: Pharmacovigilance and case-series data indicate that combinations of Ginkgo with SSRIs may increase hemorrhagic complications; pooled safety reports show bleeding events where Ginkgo was used with psychotropic drugs. <li> Scientific_Study_Title: Unwanted effects of psychotropic drug interactions with medicinal products and diet supplements containing plant extracts. <li> Scientific_Study_Authors: Paśko P, et al. <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/30659561/ <li> Scientific_Study_Excerpt: <p>Summary: Analysis of adverse events related to plant-extract supplements in psychiatric pharmacotherapy found hemorrhagic complications among the most common interactions reported with Ginkgo plus SSRIs, supporting clinical caution and the need to monitor for bleeding when these agents are combined.</p> </ul>