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Parenteral Products

Liquid or semisolid dosage forms administered through injections, bypassing the gastrointestinal tract.

Parenteral Products — Microbiological Stability

Ensuring sterility is crucial because these products are directly administered into the body.

Parenteral Products — Sterility Concerns

Once a vial is punctured, sterility cannot be guaranteed.

Multi-use Products

Products that require bacteriostatic/fungistatic agents to prevent microbial growth in the remaining contents after use.

Immediate Release (IR) — Parenteral Forms

Rapid drug release, typically formulated without extended-release properties.

Modified Release (MR) — Parenteral Forms

Not limited by gastrointestinal transit time; desired time-release characteristics can be achieved by adjusting viscosity and particle size.

Modified Release (MR) — Manipulation of Physical Properties

Adjusting viscosity and particle size to achieve desired time-release characteristics.

Sterilization Techniques

1. Sterile Filtration/Aseptic Processing. 2. Terminal Sterilization.

Sterile Filtration/Aseptic Processing

Passing the solution through a filter to retain bacteria.

Terminal Sterilization

Sterilization performed after formulation, including moist heat or radiation.

Terminal Sterilization — Moist Heat

Using an autoclave for aqueous solutions.

Terminal Sterilization — Radiation

Gamma irradiation for heat-labile materials.

Common Types of Injectable Formulations

1. Injectable Aqueous Solutions. 2. Injectable Aqueous Suspensions. 3. Injectable Organic Solutions/Suspensions. 4. Lyophilized Powders for Injection.

Injectable Aqueous Solutions

A solution in which the solvent is water.

Injectable Aqueous Suspensions

A heterogeneous mixture in which the solid particles do not dissolve but are suspended throughout the bulk of the solvent.

Injectable Organic Solutions/Suspensions

Injectable formulations using organic solutions or suspensions.

Lyophilized Powders for Injection

Freeze-dried powders intended for reconstitution.

Oxytetracycline Injectable Example

Oxytetracycline as hydrochloride, 200 mg/mL, in a clear, yellow, aqueous solution for injection.

Special Dosage Form Considerations with IA Drugs

Considerations for intra-articular drugs, including their indications, common drugs used, sterility, formulation, minimizing systemic effects, and treatment monitoring.

Intra-Articular (IA) Injections — Horses

Used for lameness examinations and treatment of noninfectious inflammatory joint diseases.

IA Injections — Lameness Examinations in Horses

Used to anesthetize or block a joint for diagnostic purposes.

IA Injections — Noninfectious Inflammatory Joint Diseases in Horses

Used to treat conditions such as synovitis and capsulitis.

IA Injections — Benefits in Horses

Targeted drug delivery to the affected joint, reducing the need for systemic treatments.

IA Injections — Dogs

Used as adjunctive treatment of synovitis.

Hyaluronate Sodium in Dogs

Used for IA injections to reduce joint inflammation and pain in dogs with synovitis.

Common Drugs Used in Intra-Articular Injections

Glucocorticoids and hyaluronic acid.

Glucocorticoids — Purpose

Provide anti-inflammatory effects, crucial in managing joint diseases like synovitis.

Glucocorticoids — IA Administration

Reduces adverse effects associated with high systemic doses and is commonly used in horses to manage joint inflammation effectively.

Hyaluronic Acid — Purpose

Provides lubrication and protection of joint tissues, enhances joint function, and reduces pain.

Hyaluronic Acid — IA Administration

Used in both horses and dogs, particularly for treating synovitis.

Special Considerations for IA Injection

1. Sterility. 2. Formulation. 3. Minimizing Systemic Effects. 4. Treatment Monitoring.

IA Injection — Sterility

All IA injections must be sterile to prevent joint infections, which can lead to severe complications.

IA Injection — Preferred Dosage Form

Aqueous solutions are preferred due to their compatibility with joint tissues.

IA Injection — Formulation

Sterile aqueous solutions are used to ensure safety and efficacy; special care is taken to avoid irritation and ensure compatibility with synovial fluid.

IA Injection — Minimizing Systemic Effects

IA injections allow high local concentrations of the drug with minimal systemic exposure, reducing the risk of side effects common with systemic administration.

IA Injection — Treatment Monitoring

Regular monitoring of the joint's response to IA injections is crucial to adjust treatment as needed and prevent adverse reactions.

Recombinant Proteins and Peptides

Biotechnologically engineered compounds that have become essential in veterinary medicine for enhancing productivity and managing specific health conditions in animals.

Recombinant Proteins and Peptides — Veterinary Species

Used in various species, including cattle, pigs, sheep, and horses.

Recombinant Proteins and Peptides — Objectives

1. Increased feed conversion efficiency. 2. Improved milk production. 3. Leaner carcasses.

Recombinant Proteins and Peptides — Formulation Challenge

Their formulation and delivery present unique challenges due to their chemical and physical instability.

Special Dosage Form Considerations with Recombinant Proteins and Peptides

Considerations necessary for ensuring the efficacy and stability of recombinant proteins and peptides in veterinary applications.

Applications of Recombinant Proteins and Peptides in Veterinary Medicine

1. Cattle — Bovine Growth Hormone (bGH). 2. Pigs — Porcine Growth Hormone (pGH). 3. Sheep — Epidermal Growth Factor (EGF). 4. Horses — Equine Growth Hormone (eGH).

Bovine Growth Hormone (bGH)

Used in cattle to increase feed conversion efficiency and milk production and enhance overall productivity in dairy and beef cattle.

Porcine Growth Hormone (pGH)

Administered to pigs to improve feed conversion efficiency and promote the production of leaner carcasses desirable in meat production.

Epidermal Growth Factor (EGF)

Used in sheep for chemical shearing, a process that facilitates the removal of wool and reduces the labor-intensive manual shearing process.

Equine Growth Hormone (eGH)

Administered to horses to decrease the incidence of skeletal weaknesses, particularly in performance horses, and helps prevent leg injuries by promoting stronger bones.

Cattle — Recombinant Protein/Peptide Application

Bovine Growth Hormone (bGH): increases feed conversion efficiency and milk production and enhances overall productivity in dairy and beef cattle.

Pigs — Recombinant Protein/Peptide Application

Porcine Growth Hormone (pGH): improves feed conversion efficiency and promotes leaner carcasses.

Sheep — Recombinant Protein/Peptide Application

Epidermal Growth Factor (EGF): used for chemical shearing and reduces the labor-intensive manual shearing process.

Horses — Recombinant Protein/Peptide Application

Equine Growth Hormone (eGH): decreases skeletal weaknesses, particularly in performance horses, and helps prevent leg injuries by promoting stronger bones.