Depo-Medrol (Methylprednisolone Acetate) Injectable Suspension, 20 mg/mL or 40 mg/mL

Depo-Medrol Injection is a potent, long-acting veterinary corticosteroid formulated for parenteral administration in dogs, cats, and horses to suppress severe inflammation, allergic reactions, and immune-mediated disorders. Containing the active glucocorticoid methylprednisolone acetate in a slow-release aqueous suspension, this professional-grade therapeutic preparation provides sustained, extended-duration relief from dermatological conditions, musculoskeletal inflammation, and acute arthritis. Because systemic corticosteroid therapy profoundly impacts endocrine, metabolic, and immune function, administration requires precise veterinary diagnosis, strict species-specific dosing, and careful clinical monitoring.

What Is Depo-Medrol Injection?

Depo-Medrol is a specialized veterinary sustained-release steroid compound formulated for parenteral delivery under professional veterinary supervision.

Active Ingredients and Formulation

• Active Component: Methylprednisolone acetate at a concentration of 20 mg/mL (for dogs and cats) or 40 mg/mL (for horses and larger dogs). It acts as a long-acting synthetic glucocorticoid that inhibits inflammatory cell infiltration, suppresses immune responses, and reduces capillary permeability.

• Vehicle and Presentation: Supplied as a sterile, aqueous microcrystalline suspension packaged in multi-dose glass vials designed for aseptic veterinary injection.

What Is It Used For?

Primary Veterinary Indications

• Allergic and Dermatological Conditions: Routinely prescribed by veterinarians to control severe allergic dermatitis, atopic dermatitis, eczema, pruritus, and insect bite hypersensitivity in dogs and cats.

• Musculoskeletal and Joint Inflammation: Utilized in horses, dogs, and cats to alleviate pain, swelling, and lameness associated with osteoarthritis, tendinitis, bursitis, and periarthritis (via intra-articular, intramuscular, or subcutaneous routes depending on the species).

• Immune-Mediated Diseases: Administered under clinical protocols to manage various systemic autoimmune and inflammatory disorders.

Administration and Dosage Considerations

Route and Dosing

• Route of Administration: Administered via intramuscular (I.M.), subcutaneous (S.C.), or strict intra-articular (I.A.) injection, depending on the target species and clinical indication. Do not use intravenously.

• Standard Dosage Reference:

  • Canine (I.M./S.C.): Typically dosed at an average of 1 mg per lb (2.2 mg per kg) of body weight, administered as a single injection, repeated as necessary based on clinical response.

  • Feline (I.M./S.C.): Typically dosed at 10 mg to 20 mg total per cat as a single injection, depending on body weight and severity of condition.

  • Equine (I.A./I.M.): Intra-articular doses range from 40 mg to 240 mg depending on the size of the joint and severity of inflammation.

• Veterinary Supervision: Selection of route, precise dosage, and injection intervals must be determined and monitored exclusively by a licensed veterinarian.

Important Safety Information

• Contraindications: Do not administer to animals with systemic fungal infections, viral infections, active gastrointestinal ulceration, renal disease, Cushing’s disease, or known hypersensitivity to methylprednisolone. Do not vaccinate with modified-live vaccines during therapy.

• Side Effects and Precautions: Long-term or high-dose usage can lead to polyuria, polydipsia, polyphagia, muscle wasting, delayed wound healing, immunosuppression, and iatrogenic hyperadrenocorticism (Cushing’s syndrome). In cats, prolonged use carries a risk of steroid-induced diabetes mellitus or congestive heart failure.

• Withdrawal Periods: Observe mandatory meat and milk withdrawal intervals established by regulatory authorities if treating food-producing equines or livestock intended for human consumption.

• Professional Guidance: Due to its prolonged depot action and profound systemic impact, use must be managed under direct veterinary clinical oversight.

Storage and Handling

• Store at controlled room temperature between 15°C and 30°C (59°F to 86°F). Protect from excessive heat and freezing. Shake well before drawing each dose.

• Maintain strict aseptic technique when puncturing the vial stopper.

• Keep securely out of reach of children, unauthorized individuals, and animals at all times.

Frequently Asked Questions

What is Depo-Medrol Injection used for?

It is a professional long-acting steroid injection utilized to control severe allergies, skin inflammation, arthritis, and immune-mediated conditions in dogs, cats, and horses.

What is the active ingredient?

It contains methylprednisolone acetate (20 mg/mL or 40 mg/mL), a sustained-release synthetic glucocorticoid that suppresses inflammation and immune responses.

How is Depo-Medrol administered?

It is administered via intramuscular, subcutaneous, or intra-articular injection following precise species-specific guidelines under veterinary supervision.

Order Rx Depo-Medrol Injection Online

Rx Depo-Medrol (Methylprednisolone Acetate) Injectable Suspension is available for order through our platform subject to veterinary prescription verification and regulatory compliance. For assistance regarding prescription submission, stock availability, or secure shipping protocols, please contact our customer support team.