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White Willow Bark Side Effects & Safety

Evidence:Moderate
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This content is for informational purposes only and does not constitute medical advice. Statements about dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary — consult your healthcare provider before starting any supplement. Full disclaimer

Safety Profile

Overall safety rating: Safe with Caution

Potential Side Effects

  • GI discomfort (nausea, stomach pain) — less common than with aspirin
  • Allergic reaction in aspirin-sensitive individuals — CONTRAINDICATED in aspirin allergy
  • Not recommended for children under 16 due to theoretical Reye's syndrome risk
  • May cause dizziness or drowsiness (rare)

Drug & Supplement Interactions

  • Aspirin and NSAIDs — do not combine; additive effects increase bleeding and GI risk
  • Anticoagulants (warfarin) — salicylates may increase bleeding risk; monitor INR
  • Methotrexate — salicylates can reduce renal clearance of methotrexate, increasing toxicity risk
  • Phenytoin, valproic acid — salicylates may displace these from protein binding, increasing free drug levels

Maximum Dose

Do not exceed: 240mg salicin daily is the maximum studied dose; do not exceed without medical supervision

Full White Willow Bark Guide

References

  1. RCTChrubasik S, Eisenberg E, Balan E, et al. (2000). Treatment of low back pain exacerbations with willow bark extract: a randomized double-blind study. American Journal of Medicine. DOI PubMed
  2. RCTSchmid B, Lüdtke R, Selbmann HK, et al. (2001). Efficacy and tolerability of a standardized willow bark extract in patients with osteoarthritis: randomized placebo-controlled, double blind clinical trial. Phytotherapy Research. DOI PubMed
  3. ReviewVlachojannis JE, Cameron M, Chrubasik S (2009). A systematic review on the effectiveness of willow bark for musculoskeletal pain. Phytotherapy Research. DOI PubMed
  4. RCTEvans M, Sulley AM, Crowley DC, Langston J, et al. (2020). Pain Bloc-R Alleviates Unresolved, Non-Pathological Aches and Discomfort in Healthy Adults-A Randomized, Double-Blind, Placebo-Controlled, Crossover Study.. Nutrients. DOI PubMed
  5. RCTNieman DC, Shanely RA, Luo B, Dew D, et al. (2013). A commercialized dietary supplement alleviates joint pain in community adults: a double-blind, placebo-controlled community trial.. Nutrition journal. DOI PubMed