Theophylline is a commonly used bronchodilator drug for treatment of chronic canine bronchitis, but no formulations validated in dogs are currently available. An oral, modified and compounded theophylline product (MCT), which could fulfil this need, is available through a USP-compliant, veterinary compounding pharmacy; however, its pharmacokinetic properties are unknown. The aim of this study was to determine the pharmacokinetics of MCT. Plasma drug concentrations were measured in seven healthy, fed dogs after single doses of intravenous aminophylline (8.6 mg/kg theophylline equivalent) and oral MCT (10 mg/kg). Systemic bioavailability of the MCT was 96.2 ± 32.9%. MCT times to maximum concentration, mean absorption time and terminal half-life were 8.85 ± 3.63, 6.95 ± 3.42, and 8.67 ± 1.62 hr, respectively. Based on simulations of 10 mg/kg and 12-hr dosing, steady-state plasma theophylline concentrations are expected to exceed the minimum therapeutic concentration for 71.7 ± 35.6% of the dosing interval. Overall, the MCT product investigated showed similar pharmacokinetic characteristics compared to previously validated extended-release theophylline products. An oral dose of 10 mg/kg q 12 hr is likely an appropriate dosage to begin therapy; however, therapeutic drug monitoring may be warranted because of inter-individual variation.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/jvp.12813 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Evaluation of an indirect Na1.7 inhibitor as adjunctive analgesic in burn-related neuropathic pain in a cat.
Vet Anaesth Analg
January 2025
Department of Pharmacology and Therapeutics, University of Florida, College of Medicine, Gainesville, FL, USA.
Burn-related neuropathic pain (BRNP) can arise following burn-induced nerve damage, affects approximately 6% of burned human patients and can result in chronic pain. Although widely studied in humans, data on BRNP or its treatment in animals is lacking. A 4-year-old domestic shorthair cat was presented with an infected, non-healing wound suspected to be a caustic burn.
View Article and Find Full Text PDFDevelopment of an Analytical Model for Predicting the Shear Viscosity of Polypropylene Compounds.
Polymers (Basel)
January 2025
Institute for Plastics Processing (IKV) in Industry and Craft, RWTH Aachen University, Seffenter Weg 201, 52074 Aachen, Germany.
The need for an efficient adaptation of existing polypropylene (PP) formulations or the creation of new formulations has become increasingly important in various industries. Variations in viscosity resulting from changes in raw materials, fillers, and additives can have a significant impact on the processing and quality of PP products. This study presents the development of an analytical model designed to predict the shear viscosity of complex PP blends.
View Article and Find Full Text PDFNavigating Regulatory Frameworks and Compliances for Bacteriophages as Therapeutic Agents.
Curr Pharm Biotechnol
January 2025
Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
The emergence of multiple antibiotic resistance in recurrent bacterial infections has led to exploring alternative therapeutic options, including using bacteria lysing viruses [bacteriophages] to control recalcitrant infections. Bacteriophages [Phage] and their end products such as enzymes, virus-like particles, and vectors are being used for varied applications such as basic and applied research for the field of phage therapeutics. Phage-based products and services such as viral vectors for gene therapy/vaccines, imaging agents, diagnostics as well as drug delivery agents form a wide range of useful innovative therapeutics that are under development.
View Article and Find Full Text PDFDesign and Process Considerations for Preparation of Modified Release Ivermectin and Praziquantel Tablets by Wet Granulation.
AAPS PharmSciTech
January 2025
University of Maryland, School of Pharmacy, Department of Pharmaceutical Sciences, 20 N Pine Street, Baltimore, Maryland, 21201, USA.
Dosage forms containing Ivermectin (IVER) and Praziquantel (PRAZ) are important combination drug products in animal health. Understanding the relationship between products with differing in vitro release characteristics and bioequivalence could facilitate generics. The goal of this study was to create granulations for each active ingredient, with similar release mechanisms, but substantially different in vitro release rates, and then compressing these granulations into tablets with differing release rates.
View Article and Find Full Text PDFUniversal Construction of Electrical Insulation and High-Thermal-Conductivity Composites Based on the In Situ Exfoliation of Boron Nitride-Graphene Hybrid Filler.
ACS Appl Mater Interfaces
January 2025
Institute of Soft-matter and Advanced Functional Materials, Gansu Province Carbon New Material Industry Technology Center, School of Materials and Energy, Lanzhou University, Lanzhou 730000, China.
Hexagonal boron nitride (h-BN), with excellent thermal conductivity and insulation capability, has garnered significant attention in the field of electronic thermal management. However, the thermal conductivity of the h-BN-enhanced polymer composite material is far from that expected because of the insurmountable interfacial thermal resistance. In order to realize the high thermal conductivity of polymer composite thermal interface materials, herein, an in situ exfoliation method has been employed to prepare a boron nitride nanosheet-graphene (BNNS-Gr) hybrid filler.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!