



It combines the anti-inflammatory properties of dexamethasone with the analgesic effects of phenylbutazone, making it effective for conditions like arthritis, tendonitis, and laminitis.Â
The injectable solution is administered via slow IV injection, with typical dosages ranging from 6-20 ml depending on the severity of the condition.Â
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Managing severe acute lameness, osteoarthritis, bursitis, tendinitis, and traumatic musculoskeletal injuries in performance horses demands a potent, fast-acting anti-inflammatory response. When articular cartilage or soft tissue suffers mechanical trauma, damaged cell membranes release phospholipids, triggering the cascade that produces inflammatory prostaglandins, leukotrienes, and tissue-damaging free radicals.
Left unmanaged, acute musculoskeletal inflammation causes severe pain, joint capsule swelling, permanent tendon degeneration, and prolonged downtime for performance animals.
Relying on a single anti-inflammatory agent often requires higher dosages, which can increase the risk of systemic side effects without fully interrupting both early and late-stage inflammatory pathways.
To achieve fast, deep joint pain relief and rapid fluid reduction while keeping individual drug concentrations optimized, equine veterinarians rely on combination anti-inflammatory therapies. Dexaphenylbutazone Injectable Solution is a premier, multi-active parenteral formula combining Phenylbutazone (a non-steroidal anti-inflammatory drug) and Dexamethasone (a potent glucocorticoid). This synergistic dual-action combination targets two distinct points in the inflammatory cascade, delivering immediate and extended relief from severe equine lameness and tissue swelling.
This comprehensive clinical manual covers dual-pathway pharmacodynamics, tissue distribution kinetics, musculoskeletal indications, and precise administration protocols for Dexaphenylbutazone.
Dexaphenylbutazone delivers a powerful, multi-target anti-inflammatory mechanism that simultaneously blocks upstream and downstream chemical mediators:
[Dexaphenylbutazone IV Injection Administered]
|
[Rapid Systemic Absorption into Blood Plasma]
|
[Dual Anti-Inflammatory Pathway Action]
|
-------------------------------------------------
| |
[UPSTREAM GLUCOCORTICOID SHIELD] [DOWNSTREAM NSAID BLOCKADE]
(Dexamethasone) (Phenylbutazone)
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v v
[Inhibits Phospholipase A2 & Cytokines] [Inhibits Cyclooxygenase (COX) Enzymes]
(Prevents Arachidonic Acid Release) (Blocks Prostaglandin E2 Synthesis)
| |
v v
[Rapidly Reduces Joint Swelling & Fluid] [Provides Extended Deep Pain Relief]
| |
------------------------> <----------------------
|
v
[Synergistic Resolution of Severe Lameness & Edema]
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[Restoration of Normal Joint Mobility & Stride]
Phenylbutazone is a pyrazolone non-steroidal anti-inflammatory drug (NSAID). It acts by reversibly inhibiting the cyclooxygenase (COX) enzymes, preventing the conversion of arachidonic acid into pro-inflammatory prostaglandins (particularly $\text{PGE}_2$) and thromboxanes. This reduces peripheral pain signaling, localized heat, and vascular swelling within joints, bursae, and tendon sheaths.
Dexamethasone is a highly potent synthetic glucocorticoid with minimal mineralocorticoid activity. It acts upstream by inducing lipocortins, which directly inhibit the phospholipase $\text{A}_2$ enzyme. By blocking phospholipase $\text{A}_2$, dexamethasone stops the initial breakdown of cell membrane phospholipids into arachidonic acid, halting the production of both prostaglandins and leukotrienes while suppressing inflammatory cytokine release.
By targeting both upstream enzyme release (dexamethasone) and downstream enzyme activity (phenylbutazone), Dexaphenylbutazone achieves a synergistic anti-inflammatory and analgesic effect that is significantly more effective than either agent administered alone at equivalent doses.
Dexaphenylbutazone Injectable Solution is an essential therapeutic tool in equine sports medicine and large animal care:
Acute Musculoskeletal Lameness: Relieves acute pain and stiffness associated with osteoarthritis, ringbone, sidebone, splints, and carpitis (bucked shins).
Soft Tissue & Tendon Trauma: Reduces inflammatory fluid, edema, and lameness in acute tendinitis, tenosynovitis, and desmitis (ligament strain).
Post-Surgical & Traumatic Inflammation: Controls post-traumatic joint capsular swelling, surgical edema, and acute tissue inflammation following arthroscopic procedures or traumatic wounds.
Bursitis & Capsulitis: Clears deep synovial fluid accumulation and capsular inflammation in bursitis (poll evil, capped elbow, capped hock).
To ensure patient safety and avoid severe tissue sloughing, Dexaphenylbutazone must be administered strictly according to intravenous guidelines.
1.Verify Strict Intravenous Injection Route:Route Verification.
Dexaphenylbutazone is formulated strictly for Intravenous (IV) injection. Do not administer intramuscularly (IM) or subcutaneously (SQ).
2.Calculate Precise Body Weight Dose:Dosage Calculation.
Determine exact body weight to calculate dosage. The standard clinical dose for horses is 1.0 to 2.0 mL per 100 kg (220 lbs) body weight intravenously per day.
3.Ensure Accurate Jugular Vein Placement:Needle Placement.
Confirm proper placement within the jugular vein prior to injection. Aspiration of dark venous blood is mandatory before depressing the plunger to avoid accidental intra-arterial or perivascular leakage.
4.Inject Slowly & Monitor Response:Injection Delivery.
Inject the dose slowly. Treatment is typically administered for 3 to 5 consecutive days as indicated by clinical response, then tapered to lower maintenance doses.
The table below outlines standard clinical dosing parameters for Dexaphenylbutazone Injectable Solution:
| Target Animal Class | Active Ingredients / mL | Volumetric Dosing Ratio | Approved Route | Recommended Duration |
| Light Horses (250 kg / 550 lbs) | Phenylbutazone + Dexamethasone | $2.5$ to $5.0\ \text{mL}$ per day | Strict IV Only | 3 to 5 Days |
| Medium Horses (450 kg / 1000 lbs) | Phenylbutazone + Dexamethasone | $4.5$ to $9.0\ \text{mL}$ per day | Strict IV Only | 3 to 5 Days |
| Heavy Horses (600 kg / 1300 lbs) | Phenylbutazone + Dexamethasone | $6.0$ to $12.0\ \text{mL}$ per day | Strict IV Only | 3 to 5 Days |
STRICT INTRAVENOUS USE ONLY: Do not inject subcutaneously, intramuscularly, or perivascularly. Perivascular leakage of phenylbutazone causes severe localized tissue inflammation, phlebitis, necrosis, and tissue sloughing. Intra-arterial injection can trigger immediate CNS excitation, collapse, and severe shock.
Laminitis & Glucocorticoid Warning: Because this product contains dexamethasone, use with caution in horses prone to laminitis or metabolic dysfunction.
Gastric Ulceration & Renal Precautions: Prolonged use of phenylbutazone can cause right dorsal colitis, gastric ulceration, or renal papillary necrosis. Ensure horses remain well-hydrated during therapy.
Food Animal Restrictions: Do not use in horses intended for human consumption or in dairy cattle producing milk for human consumption.
Storage Parameters: Store at controlled room temperature between 15°C and 25°C (59°F to 77°F). Protect from direct sunlight and freezing.
Phenylbutazone is extremely irritating to soft tissues outside the bloodstream. Intramuscular (IM) or accidental perivascular (outside the vein) injection causes severe muscle swelling, sterile abscesses, tissue necrosis, and skin sloughing.
Because dexamethasone and phenylbutazone are delivered directly into systemic circulation via IV injection, peak anti-inflammatory action begins within 1 to 2 hours, providing visible reduction in joint fluid and lameness.
No. Phenylbutazone and dexamethasone are regulated substances under FEI and USEF guidelines. Mandatory detection times and drug withdrawal windows must be observed prior to official competition.
You can safely purchase authentic, factory-sealed Dexaphenylbutazone Injectable Solution online through Equines Vet Care. We store and manage all inventory under strict environmental controls to guarantee absolute product stability and full therapeutic potency.
At Equines Vet Care, we understand that managing severe equine lameness and joint inflammation requires absolute product reliability. Every vial of Dexaphenylbutazone Injectable Solution is sourced through authorized distribution networks, stored in our climate-controlled facility, and shipped securely to ensure complete product quality.
Dexaphenylbutazone is another active ingredient in this product belongs to NSAIDs group of drugs and its mechanism of action is different from dexamethasone. Like other NSAID drugs phenylbutazone inhibits the prostaglandin’s inflammatory effects that reduce pain and inflammation in the body and increase speed and performance during race By this mechanism other effects of prostaglandins like fever is also blocked. Besides phenylbutazone interfere in early stage of inflammation and reduce the permeability of vascular beds and prevent from edema and diapedesis (the passage of blood cells through the intact walls of the capillaries, typically accompanying inflammation)
dexaphenylbutazone is a member of glucocorticoid family and like other drugs in this group it has a pharmacologic effect in all cells on the body. From different effects immunosuppressive (partially or completely suppressing the immune response of an individual) and anti inflammatory actions have been more evaluated and is indicated in these medical conditions. Glucocorticoid drugs inhibit the effects of lytic enzymes (relating to or causing lysis in tissues and cells as a destruction effect), which are released in inflammations and severe stress conditions. Also the phagocytosis effect by macrophages will be decreased.
By the combination of two active ingredients with different mechanism of action anti-inflammatory and pain relief of this product is predominant.
Anti inflammatory, antipyretic and analgesic. Musculoskeletal inflammations like arthritis, osteoarthritis, laminitis and tendonitis in horses.
Horses: 20 ml/day by slow IV injection that can be repeated depending on the severity of the conditions.
Foals: Slow IV or deep IM: 6 – 10 ml to be repeated 24 -48 hours later depending on the severity of the case.
In case of vascular brittle and congestion the recommended dose must be decreased and the second dose must not be applied.
Also in the animals with heart, liver or kidney problems or in the end term of pregnancy this product is contraindicated.
None
After the use of first dose the remaining medicine can be used in 28 days.
Protect the vials in boxes and out of the direct sun light.
Do not use concomitantly with NSAIDs and other corticosteroid drugs. IV injection must be done slowly.
Do not use more than recommended dosage.
Do not sale without veterinary prescription.
Keep out of reach of children.
Protect in 15 – 25° C and direct sun light.
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