Hi-Tech Pharmaceuticals Nexrutine® delivers 500mg of Phellodendron Amurense bark extract per tablet — standardized as Nexrutine®, a patented extract specifically developed for COX-2 inhibition — with Hi-Tech's Cyclosome Technology (HPBCD + Phosphatidylcholine 75%) for enhanced bioavailability and lymphatic absorption. Nexrutine® has demonstrated 95% COX-2 enzyme inhibition in human cyclooxygenase-2 assays with less than 10% COX-1 inhibition — a highly selective anti-inflammatory profile that targets the inducible COX-2 pathway responsible for inflammatory pain while largely sparing COX-1, the constitutive enzyme that protects gastric lining. The Phellodendron Amurense tree bark from which Nexrutine® is derived has been safely used in traditional medicine in Asia for over 1,500 years, and is also a natural source of Berberine. Take 1 tablet twice daily with or without food. 60 tablets — 30-day supply. Safe for men and women. California Prop 65 Warning applies.†
Supplement Facts — Hi-Tech Pharmaceuticals Nexrutine® (Per 1 Tablet / 60 Servings)
Phellodendron Amurense (Bark) (as Nexrutine®) — 500mg
Other Ingredients: Microcrystalline Cellulose, Phosphatidylcholine 75%, Hydroxypropyl Beta Cyclodextrin (HPBCD), Phytosterols, Magnesium Stearate, Silica
Delivery: Cyclosome Technology (HPBCD + Phosphatidylcholine 75%) — liposomal lymphatic absorption for enhanced bioavailability
Nexrutine® is a patented extract — not generic Phellodendron bark powder
95% COX-2 enzyme inhibition in human cyclooxygenase-2 (COX-2) assays
Less than 10% COX-1 inhibition — highly selective, gastric-sparing profile
Natural source of Berberine from Phellodendron Amurense bark
Phellodendron bark safely used in Asia for over 1,500 years
Take 1 tablet twice daily with or without food
60 tablets — 30-day supply at twice-daily dosing
Safe for men and women
Not for individuals under 18. Not for pregnant or nursing women.
Consult a physician before use if taking any prescription medications
California Prop 65 Warning applies.
What Makes Nexrutine® Different — COX-2 Selectivity
To understand why Nexrutine® matters, you need to understand the COX enzyme system. COX (cyclooxygenase) enzymes convert arachidonic acid into prostaglandins — the signaling molecules that produce inflammation, pain, and fever. There are two primary COX isoforms: COX-1 and COX-2. COX-1 is a constitutive enzyme — it is always present in cells and performs housekeeping functions including protecting the stomach lining, supporting kidney function, and maintaining platelet aggregation for normal blood clotting. COX-2 is an inducible enzyme — it is largely absent in normal tissue but produced rapidly in response to injury, infection, and inflammatory stimuli, driving the acute inflammatory response and the pain signals associated with it.†
This distinction matters enormously for the anti-inflammatory supplement and pharmaceutical categories. Traditional NSAIDs (aspirin, ibuprofen, naproxen) inhibit both COX-1 and COX-2 non-selectively. The COX-2 inhibition produces the anti-inflammatory and pain-relieving effect. The COX-1 inhibition produces the side effects: gastric ulceration and bleeding (loss of gastric mucosal protection), increased bleeding time (reduced platelet function), and kidney stress (reduced prostaglandin-mediated renal blood flow). Pharmaceutical selective COX-2 inhibitors (Celecoxib/Celebrex) were developed specifically to provide the anti-inflammatory benefit of NSAID use while sparing COX-1 and its gastric and renal protective functions.†
Nexrutine® achieves the same selectivity goal naturally — 95% inhibition of COX-2 with less than 10% inhibition of COX-1. This profile means meaningful anti-inflammatory and joint pain support through the COX-2 pathway with a gastric safety profile substantially better than non-selective NSAID use, and without the cardiovascular concerns that were subsequently associated with some pharmaceutical COX-2 inhibitors at high doses. As a botanically derived COX-2 selective ingredient, Nexrutine® occupies a category that most joint supplements entirely miss — most standard joint formulas use glucosamine, chondroitin, and MSM for structural support, not COX-2 pathway-targeted inflammation modulation.†
Phellodendron Amurense — 1,500 Years of Traditional Use and Modern Research
Phellodendron Amurense (Amur Cork Tree) is a deciduous tree native to eastern Asia — found in China, Korea, Japan, and Russia — whose thick, corky bark has been a cornerstone of traditional Chinese medicine (TCM) and Korean medicine for over 1,500 years. In TCM, Phellodendron bark (Huang Bai) is classified as a bitter, cold herb used specifically for clearing heat and drying dampness — the traditional framework that corresponds to its documented anti-inflammatory and antimicrobial properties in modern pharmaceutical terms. It has been used traditionally for conditions involving inflammation, infection, and pain — applications that correlate directly with its modern documented mechanisms of COX-2 inhibition and antibacterial activity from its berberine and berberrubine alkaloid content.†
Modern research on Phellodendron Amurense has confirmed and expanded on the traditional applications. A safety study published in Heliyon (2021) specifically on Nexrutine® — the patented extract in Hi-Tech's formula — documented safe repeated oral exposure in 28-day rat studies with no adverse findings at therapeutic doses. The Nexrutine® brand designation reflects not just the plant material but the specific extraction and standardization process that concentrates the COX-2 inhibiting alkaloid fraction to the level that produces the 95% COX-2 inhibition result — generic Phellodendron bark powder without this standardization would not produce the same selectivity or potency.†
Berberine — The Secondary Active in Nexrutine®
Phellodendron Amurense bark is one of nature's richest sources of Berberine — the alkaloid that has gained significant attention in recent years for its documented effects on blood sugar metabolism, cardiovascular health, and gut microbiome support. The Nexrutine® formula delivers its documented Berberine content alongside the COX-2 inhibiting alkaloid fraction that is its primary intended activity. For users taking Nexrutine® for joint support, the Berberine content provides additional systemic metabolic benefits beyond the joint inflammation pathway — supporting the overall framework of reduced inflammation that benefits both joints and metabolic health simultaneously. Hi-Tech also markets a standalone Berberine product (Berberine 120 Tablets) for users who specifically want maximum Berberine dose — Nexrutine® provides a meaningful Berberine contribution as part of its Phellodendron bark extract without being positioned as a dedicated Berberine supplement.†
Cyclosome Technology — Delivering Nexrutine® Past the First-Pass Problem
The alkaloid compounds responsible for Nexrutine®'s COX-2 inhibiting activity — berberine and related protoberberine alkaloids — are well-known to have poor oral bioavailability in conventional formulations. Berberine specifically has documented first-pass hepatic metabolism and P-glycoprotein efflux that limit the fraction of an oral dose reaching systemic circulation intact. Hi-Tech's Cyclosome Technology (HPBCD + Phosphatidylcholine 75%) addresses this through the same mechanism applied across their supplement lineup: encapsulating the active compounds in a cyclodextrin-liposomal complex that protects them from first-pass degradation and facilitates absorption through the intestinal lymphatic system (lacteals) rather than the portal blood system. The lymphatic pathway bypasses hepatic first-pass metabolism, delivering more intact Nexrutine® alkaloids to systemic circulation for greater anti-inflammatory effect per 500mg tablet than unformulated Phellodendron extract could achieve.†
Who Nexrutine® Is For — The Joint Health Applications
Nexrutine® addresses joint and muscle discomfort through a fundamentally different mechanism than structural joint supplements — it targets the inflammatory signaling pathway that produces pain and swelling rather than providing substrate for cartilage repair. This makes Nexrutine® particularly appropriate for three specific use cases. First: athletes and active individuals experiencing exercise-induced inflammatory joint discomfort — the COX-2 pathway is specifically upregulated in response to mechanical stress on joint tissue, and COX-2 selective inhibition addresses this directly without the systemic COX-1 suppression that would compromise gut health during heavy training. Second: individuals who experience general daily joint discomfort from occupational or lifestyle physical demands who want botanical rather than pharmaceutical COX-2 management. Third: users who want to complement structural joint supplements (glucosamine, collagen) with a mechanism-directed anti-inflammatory product — the two approaches are complementary, with structural supplements supporting cartilage matrix over time and Nexrutine® addressing the acute inflammatory signaling that produces day-to-day joint discomfort.†
Frequently Asked Questions
What does "95% COX-2 inhibition with less than 10% COX-1 inhibition" mean practically?
It means Nexrutine® effectively shuts down the inducible inflammatory enzyme (COX-2) responsible for pain and swelling at joints while largely leaving intact the housekeeping enzyme (COX-1) that protects the stomach lining, supports kidney function, and maintains normal platelet function. This selectivity profile produces meaningful anti-inflammatory pain relief with substantially better gastric tolerability than non-selective NSAIDs (ibuprofen, aspirin, naproxen) that inhibit both enzymes simultaneously.†How is Nexrutine® different from glucosamine and chondroitin?
Glucosamine and chondroitin are cartilage matrix building blocks — they provide substrate for structural cartilage synthesis and may slow cartilage degradation over time. Nexrutine® is a COX-2 selective inhibitor — it targets the inflammatory signaling pathway that produces the pain and swelling of joint inflammation. The two approaches are complementary rather than competing: glucosamine and chondroitin address structural cartilage health over months of use, while Nexrutine® addresses the inflammatory signaling that produces day-to-day joint discomfort more acutely.†Can Nexrutine® be taken with ibuprofen or other NSAIDs?
Consult a physician before combining Nexrutine® with any NSAID or COX inhibitor medication. Both act through related COX enzyme mechanisms, and their combined use should be physician-supervised — particularly given ibuprofen's COX-1 inhibition (gastric effects) that stacks with any COX-modulating compound.†Is Nexrutine® appropriate for tested athletes?
Based on the disclosed formula — Phellodendron Amurense bark extract as Nexrutine® — the product does not contain any compounds currently prohibited by WADA or NCAA. Phellodendron bark alkaloids are not on any prohibited substance list. Tested athletes should review the full label and verify with their governing body as standard practice.†
How to Take Hi-Tech Pharmaceuticals Nexrutine®
Take 1 tablet twice daily with or without food. For joint discomfort related to training: take one tablet before training and one tablet post-training or before bed. For general daily joint support: take one tablet in the morning and one in the evening. Consistent twice-daily dosing produces more sustained COX-2 inhibition throughout the day than single daily dosing. Store in a cool, dry place. Not for individuals under 18. Not for pregnant or nursing women. Consult a physician before use if taking prescription medications — particularly NSAIDs, blood thinners, or any medications for inflammatory conditions. Individuals with known allergy to berberine-containing plants should consult a physician before use. California Prop 65 Warning applies.†
Why Buy at Get Yok'd
Real-time inventory across all five Southern California stores
Available in Burbank, Glendale, Glendale Galleria, Pasadena, and North Hollywood
Authorized Hi-Tech Pharmaceuticals retailer — carrying Nexrutine® alongside the full Hi-Tech nutraceutical and joint health lineup
Staff who can help you build a complete joint health protocol incorporating Nexrutine® alongside structural support supplements
One of the best loyalty programs in the supplement industry — earn rewards on every purchase
Who Should Exercise Caution with Nexrutine®
Not for individuals under 18 years of age
Not for pregnant or nursing women
Individuals taking NSAIDs (ibuprofen, aspirin, naproxen, celecoxib) should consult a physician before use — both act through COX enzyme mechanisms
Individuals taking blood thinners should consult a physician — Berberine from Phellodendron bark has mild anticoagulant properties
Individuals taking diabetes medications should consult a physician — Berberine content affects blood glucose metabolism through AMPK activation
Individuals taking thyroid medications should consult a physician — Berberine affects thyroid hormone metabolism
Individuals taking CYP3A4-metabolized medications should consult a physician — Berberine inhibits CYP3A4 and may affect drug metabolism
Consult a physician before use if taking any prescription medications or having any medical condition
California Prop 65 Warning applies.
Keep out of reach of children.
†These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.