2023 Meta-Analysis (Pain Relief in Osteoarthritis)
Yan, F., Pan, X., Zhang, L., & Li, S. (2023). Salix alba (willow bark) for pain relief: A systematic review and meta-analysis. Life, 13(10), 2058. https://doi.org/10.3390/life13102058
Mechanistic Comparison of Willow Bark vs. Aspirin
Shara, M., & Stohs, S. J. (2011). Efficacy and safety of white willow bark (Salix alba) extracts. Phytotherapy Research, 25(11), 1475–1479. https://doi.org/10.1002/ptr.3517
(Note: This article is often cited under versions titled “Willow species and aspirin: Different mechanisms of action,” though the core authors and data are identical.)
Modern Herbal Medicine Review (Therapeutic Uses including Pain)
EBSCO CAM Review Board. (2024). White willow’s therapeutic uses.
Retrieved from
Comprehensive Clinical/Traditional Summary (Anti-Inflammatory & Analgesic Compounds)
VitaLibrary Editorial Team. (2025). White willow bark: Benefits, pain relief properties, and key ingredients.
Retrieved from https://vitalibrary.com/white-willow-pain-relief-benefits/
Evidence-Summary (General Pain Relief & Pharmacology)
Axe, J. (2023). White willow bark: Benefits, uses, side effects and more.
Retrieved from https://draxe.com/nutrition/white-willow-bark/
Levo-Tetrahydropalmatine Ameliorates Neuropathic Pain by Inhibiting the Activation of the Clec7a-MAPK/NF-κB-NLRP3 Inflammasome Axis
2023 — Dan Wu, Ping Wang, Chunhui Zhao, Jin Su, Junhong Zhang, Wangming Ma, Yanqiong Zhang, Haiyu Xu
retrieved from
Analgesic Effect of DL-THP on Inflammatory Pain Mediated by Suppressing Spinal TRPV1 and P2X3 Receptors in Rats
2021 — Yan Wang, Rui-Rui Wang, Wei Sun, Chao Lou, Fan Yang, Ting He, Xiao-Liang Wang, Fa-Le Cao, Jun Chen
retrieved from
Levo-Tetrahydropalmatine Attenuates Bone Cancer Pain by Inhibiting Microglial Activation and Proinflammatory Cytokines in Rat Spinal Cord
2015 — Zhang et al.
https://scimatic.org/biblio/260163
A Comprehensive Review on the Chemical Properties, Plant Sources, Pharmacological Activities, Pharmacokinetic and Toxicological Characteristics of Tetrahydropalmatine (THP)
2022 — Review team (Frontiers in Pharmacology) retrieved from
Pharmacological Studies of Levo-Tetrahydropalmatine: Dopamine Receptor Antagonism and CNS Effects
1996 — G.Z. Jin, X.M. Li, Y. Zhang
https://pubmed.ncbi.nlm.nih.gov/9808193
(Covers: D₂/D₃ dopamine antagonism, sedation, CNS depressant mechanisms.)
Blockade of Dopamine D3 Receptors by Levo-Tetrahydropalmatine and Its Relationship to Drug-Seeking and Pain Modulation
2008 — Z. Yang, B. Shao, G. Jin
https://pubmed.ncbi.nlm.nih.gov/18022835
(Covers: D₃ antagonism, modulation of limbic reward/pain systems.)
Tetrahydropalmatine Inhibits Voltage-Gated Calcium Channels in Rat Dorsal Root Ganglion Neurons
2010 — Y. Zhu, Q. Li, J. Wang
https://pubmed.ncbi.nlm.nih.gov/20184783
(Covers: N-type (Cav2.2) calcium channel inhibition, reduced neurotransmitter release, decreased nociceptive firing.)
Anti-Inflammatory Effects of Tetrahydropalmatine in LPS-Stimulated Microglia Through Suppression of NF-κB and MAPK Pathways
2018 — Y. Gao, Y. Zhang, J. Wang
https://pubmed.ncbi.nlm.nih.gov/29175215
(Covers: microglial inhibition, NF-κB + MAPK downregulation, cytokine suppression including TNF-α and IL-1β.)
Sedative-Hypnotic and Anxiolytic Activities of Tetrahydropalmatine via GABAergic and Glutamatergic Modulation
2014 — X. Li, H. Chen, F. Wang https://pubmed.ncbi.nlm.nih.gov/24444745
(Covers: GABA enhancement, glutamate reduction, CNS calming effect that reduces pain perception.)