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Therapeutics, An Issue of Veterinary Clinics of North America: Exotic Animal Practice, E-Book

Therapeutics, An Issue of Veterinary Clinics of North America: Exotic Animal Practice, E-Book

Yvonne R.A. van Zeeland

(2018)

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Book Details

Abstract

This issue of Veterinary Clinics of North America: Exotic Animal Practice focuses on Therapeutics, with topics including: Metabolic scaling and other methods used to extrapolate drug dosages for exotics; Update on antiviral therapies in birds; Multiresistant bacteria in exotic animal medicine: fact or faux?; Emergency drugs and fluid therapy in exotics; Guidelines for treatment of toxicities in exotic animals; Nutraceuticals in exotic animal medicine; Pharmacokinetic/pharmacodynamics modelling of analgesic drugs; Psychoactive drugs in avian medicine; Cardiovascular drugs in avian and small mammal medicine; Gastrointestinal drugs in small mammal medicine; Update on cancer treatment in exotics; Drug delivery methods with emphasis on low stress handling while medicating exotic animal; and Compounding and extra-label use of drugs in exotic animal medicine.

Table of Contents

Section Title Page Action Price
Front Cover Cover
Therapeutics\r i
Copyright\r ii
Contributors iii
CONSULTING EDITOR iii
EDITOR iii
AUTHORS iii
Contents vii
Preface: Therapeutics vii
Translating Pharmacokinetic and Pharmacodynamic Data into Practice vii
The Educated Guess: Determining Drug Doses in Exotic Animals Using Evidence-Based Medicine vii
Compounding and Extralabel Use of Drugs in Exotic Animal Medicine vii
Overview of Drug Delivery Methods in Exotics, Including Their Anatomic and Physiologic Considerations viii
Low-Stress Medication Techniques in Birds and Small Mammals viii
Techniques for Monitoring Drug Efficacy viii
Group Treatment Strategies for Animals in a Zoologic Setting viii
Considerations for Treatment of Large Zoologic Collections: Fish ix
Therapeutic Contraindications in Exotic Pets ix
Prudent Use of Antimicrobials in Exotic Animal Medicine ix
Antifungal Therapy in Birds: Old Drugs in a New Jacket ix
Avian Vaccination: Current Options and Strategies x
Cardiovascular Drugs in Avian, Small Mammal, and Reptile Medicine x
Gonadotrophin-Releasing Hormone Agonists and Other Contraceptive Medications in Exotic Companion Animals x
Update on Cancer Treatment in Exotics xi
Nontraditional Therapies (Traditional Chinese Veterinary Medicine and Chiropractic) in Exotic Animals xi
VETERINARY CLINICS OF\rNORTH AMERICA: EXOTIC\rANIMAL PRACTICE\r xii
FORTHCOMING ISSUES xii
September 2018 xii
January 2019 xii
May 2019 xii
RECENT ISSUES xii
January 2018 xii
September 2017 xii
May 2017 xii
Preface:\rTherapeutics xiii
Translating Pharmacokinetic and Pharmacodynamic Data into Practice 169
Key points 169
INTRODUCTION 169
BUILDING CONFIDENCE IN INTERPRETING PHARMACOKINETIC OR PHARMACODYNAMIC PAPERS 170
What Was the Number, Gender, and Age of Animals Used in the Study? 170
Is the Study Designed as a Cross-Over, Parallel, or Single-Route Study? 170
Is the Washout Period Long Enough? 171
Was the Study Randomized and Blinded? 171
Was the Drug Used in the Study an Approved Formulation or a Compounded Product? 171
DETERMINANTS OF PLASMA DRUG CONCENTRATION 171
Absorption 172
Distribution 175
Metabolism 176
Excretion 176
Steady State Concentrations 177
Pharmacokinetic Parameters: From Paper to Practice 177
PHARMACODYNAMICS 178
Integrating Pharmacokinetics and Pharmacodynamics for Antimicrobial Selection 178
SUMMARY 179
REFERENCES 179
The Educated Guess 183
Key points 183
EVIDENCE-BASED VETERINARY MEDICINE 183
FOUR PRINCIPLES OF DRUG MOVEMENT 185
ALLOMETRIC SCALING 186
DOSE SELECTION ALGORITHM 188
Pharmacokinetic Data in a Related Species 188
Plasma Protein Binding 188
Evaluating the Risk of Adverse Events 189
Challenges of Polypharmacy 190
Titrating a Drug 190
SUMMARY 191
REFERENCE 192
Compounding and Extralabel Use of Drugs in Exotic Animal Medicine 195
Key points 195
INTRODUCTION 195
WHAT IS EXTRALABEL DRUG USE? 196
WHAT IS DRUG COMPOUNDING? 196
INDICATIONS FOR DRUG COMPOUNDING IN VETERINARY MEDICINE 196
INDICATIONS FOR DRUG COMPOUNDING IN EXOTIC ANIMAL MEDICINE 198
STANDARDS AND REGULATIONS FOR EXTRALABEL DRUG USE AND DRUG COMPOUNDING 198
United States Pharmacopeia Standards 198
Drug Compounding Laws and Regulations 199
EXTRALABEL DRUG USE AND DRUG COMPOUNDING LAWS AND REGULATIONS FOR SPECIAL CIRCUMSTANCES 200
Extralabel Drug Use and Drug Compounding in Food Animal Species 200
Compounding of Controlled Substances 201
Compounded Medications Prepared for Office Use in the Veterinary Practice 201
RISKS AND ADVERSE EVENTS ASSOCIATED WITH EXTRALABEL DRUG USE AND DRUG COMPOUNDING 201
Risks Associated with Compounded Therapies for Animals 201
Adverse Event Reporting for Veterinary Compounds 202
CHEMICAL CONSIDERATIONS FOR DRUGS AND COMPOUNDED FORMULATIONS 203
Effects of Chemical Composition and Chemical Interactions 203
Drug Stability Over Time 204
ACTIVE PHARMACEUTICAL INGREDIENTS 204
WORKING WITH THE COMPOUNDING PHARMACIST AND PHARMACY 204
DRUG COMPOUNDING IN THE VETERINARY HOSPITAL 205
Compounding Formulas and Component Selection 206
IN-HOUSE COMPOUNDED DRUG PRESCRIPTION LABELING 208
NOVEL DRUG DELIVERY METHODS FOR EXOTIC ANIMALS 209
SUMMARY 210
ACKNOWLEDGMENTS 210
REFERENCES 210
Overview of Drug Delivery Methods in Exotics, Including Their Anatomic and Physiologic Considerations 215
Key points 215
INTRODUCTION 215
DRUG ADMINISTRATION VIA INJECTABLE ROUTES 216
Intramuscular, Subcutaneous, Intraperitoneal, and Intracoelomic Drug Administration 216
Subcutaneous route 216
Intramuscular route 216
Portal systems in nonmammalian species 216
Intraperitoneal/intracoelomic route 223
Comparison of the different routes of injection 224
Intravenous, Intraosseous, and Intracardiac Drug Administration 224
Intravenous route 231
Intraosseous route 231
Intracardiac route 233
Vascular access ports 233
Extended Release Devices and Intralesional Drug Administration 233
DRUG ADMINISTRATION IN THE DIGESTIVE AND RESPIRATORY SYSTEMS 235
Oral Drug Administration 235
Oral drug administration via food or drinking water 235
Intraoral administration by syringe and gavage feeding 236
Long-term oral drug administration: feeding tube placement 238
Transmucosal Drug Administration 239
Intranasal route 240
Oral transmucosal route 240
Intrarectal or intracloacal routes 241
Administration of Medications into the Respiratory Tract 241
Intranasal and intrasinusal routes 242
Intratracheal route 242
Intrapneumonic and air sac delivery routes 243
Nebulization 243
DRUG ADMINISTRATION VIA TOPICAL ROUTES 244
Transcutaneous Absorption 244
Topical Treatments 246
SUMMARY 248
REFERENCES 248
Low-Stress Medication Techniques in Birds and Small Mammals 261
Key points 261
INTRODUCTION 261
CAPTURE AND RESTRAINT 262
THE ABCS OF DESCRIBING BEHAVIOR 264
BODY LANGUAGE: WHAT IT IS AND WHAT IT IS NOT 265
IDENTIFY FEAR AND EMPLOY DESENSITIZATION AND COUNTERCONDITIONING 265
THE APPROPRIATE USE OF CONSCIOUS SEDATION 270
MEDICATION TRAINING 271
FOOD VEHICLES 275
TEACHING ANIMALS TO TAKE MEDICATION FROM A SYRINGE 276
IN-PATIENT MANAGEMENT 277
FINDING TIME 278
EXAMINATION ROOM AND OUTPATIENT MANAGEMENT 278
FORAGING AND ENRICHMENT 279
THE POTENTIAL FOR INFLUENCE OF DRUG THERAPIES ON MEMORY AND LEARNING 281
SUPPLEMENTARY DATA 283
REFERENCES 283
Techniques for Monitoring Drug Efficacy 287
Key points 287
INTRODUCTION 287
DRUG EFFICACY 288
Dose-Response Relationship 288
Establishment of the Therapeutic Window 288
WHAT CONSTITUTES DRUG EFFICACY MONITORING? 290
THERAPEUTIC DRUG MONITORING 291
Interpretation of Therapeutic Drug Monitoring Results 292
Example Problem 293
DETERMINING THE EFFICACY OF COMPOUNDED MEDICATIONS 293
SUMMARY 294
REFERENCES 294
Group Treatment Strategies for Animals in a Zoologic Setting 297
Key points 297
INTRODUCTION 297
AMPHIBIANS 298
BIRDS 302
MAMMALS 304
SUMMARY 306
REFERENCES 306
Considerations for Treatment of Large Zoologic Collections 311
Key points 311
INTRODUCTION 311
PATIENT EVALUATION AND DIAGNOSTICS 312
TREATMENT 314
NONPHARMACOLOGIC TREATMENT OPTIONS: ENVIRONMENTAL AND NUTRITIONAL MANAGEMENT 314
PHARMACOLOGIC TREATMENT OVERVIEW 318
TREATMENT CHALLENGES 321
Parasite Management in Large Mixed Species Exhibits 321
Degradation of Praziquantel and Formalin in Recirculating Systems 323
Mycobacterial Infections 323
SUMMARY AND DISCUSSION 324
REFERENCES 324
Therapeutic Contraindications in Exotic Pets 327
Key points 327
INTRODUCTION 327
ANTIPARASITIC MEDICATIONS 328
Ivermectin 328
Fipronil 328
Benzimidazoles 329
ANTI-INFLAMMATORY MEDICATIONS 330
Glucocorticoids 330
Ibuprofen in Ferrets 333
Ketoprofen in Rats 335
CONTRAINDICATED ANTIBIOTICS IN HERBIVOROUS RODENTS AND RABBITS 335
ITRACONAZOLE IN AFRICAN GRAY PARROTS (PSITTACUS ERITHACUS) 336
REFERENCES 337
Prudent Use of Antimicrobials in Exotic Animal Medicine 341
Key points 341
INTRODUCTION 341
MONITORING OF ANTIMICROBIAL USE 342
RECOMMENDATIONS AND POLICIES 344
ANTIMICROBIAL STEWARDSHIP 345
CHALLENGES FOR RESPONSIBLE ANTIMICROBIAL USE IN EXOTIC ANIMALS 346
GUIDELINES FOR RESPONSIBLE ANTIMICROBIAL USE IN EXOTICS 347
RECOMMENDATIONS 350
ACKNOWLEDGMENTS 350
REFERENCES 350
Antifungal Therapy in Birds 355
Key points 355
INTRODUCTION 355
MECHANISM OF ACTION 356
TOXICITY 357
DRUG RESISTANCE 363
DRUG FORMULATION 363
Administration Route 365
Systemic Treatment 365
Topical Treatment 370
SUMMARY 373
REFERENCES 373
Avian Vaccination 379
Key points 379
INTRODUCTION 379
MODERN VACCINE TECHNOLOGY 380
DNA VACCINES 380
AVIAN DISEASES OF CONCERN AND VACCINE INFORMATION 381
Circoviruses 381
Avian Polyoma Virus 381
Herpesviruses 384
Pigeon Herpesvirus 385
Psittacine Bornaviruses 385
Picornaviruses 385
Duck hepatitis virus 385
West Nile Virus 386
Commercially available equine vaccines 386
Inactivated vaccines 386
Recombinant virus vaccines 387
Chimeric virus vaccines 387
Comparative testing 387
Non–commercially available vaccines 388
Tembusu virus 389
Viral encephalitides 389
Avian influenza 390
Newcastle Disease Virus 391
Pox Viruses 392
CONSIDERATIONS FOR VACCINATION STRATEGIES IN NONPOULTRY AVIAN SPECIES 393
SUMMARY 393
REFERENCES 393
Cardiovascular Drugs in Avian, Small Mammal, and Reptile Medicine 399
Key points 399
INTRODUCTION 399
CONGESTIVE HEART FAILURE AND RELATED CONDITIONS 400
Diuretics 407
Furosemide 407
Other diuretics 413
Vasodilators 413
Angiotensin-converting enzyme inhibitors 413
Other vasodilators 414
Positive Inotropes 414
Digoxin 415
Pimobendan 416
Other positive inotropes 416
Negative Inotropes 417
β-Blockers 417
Calcium channel blockers 419
Treatment of Related Conditions 420
Hypertrophic cardiomyopathy 420
Systemic hypertension 421
Pulmonary hypertension 421
Pulmonary Vasodilators 421
Other Treatment Options 422
Arrhythmias 423
Treatment of Tachyarrhythmias 424
Treatment of Bradyarrhythmias 424
Supportive Care and Husbandry Considerations 425
Supportive care 425
Fluid therapy challenges 425
Exercise restriction and housing 426
Diet and lifestyle 426
Other 426
PERICARDIAL EFFUSION/CARDIAC TAMPONADE 427
ATHEROSCLEROTIC DISEASE 428
Vasodilation 428
Isoxsuprine 428
Angiotensin-converting enzyme inhibitors 429
Sildenafil 429
Other Medical Managements 429
Pentoxifylline 429
Statins 429
Supportive Care and Husbandry Considerations 430
Supportive care 430
Exercise restriction versus promotion of exercise 430
Dietary management 430
Other 430
SUMMARY 430
REFERENCES 431
Gonadotrophin-Releasing Hormone Agonists and Other Contraceptive Medications in Exotic Companion Animals 443
Key points 443
INTRODUCTION 443
GONADOTROPHIN-RELEASING HORMONE AGONIST SLOW RELEASE IMPLANT 444
Mode of Action of a Gonadotrophin-Releasing Hormone Agonist Slow Release Implant 445
SMALL MAMMALS 445
Ferret 446
Location and technique of placement of the gonadotrophin-releasing hormone agonist slow-release implant in ferrets 446
Male 446
Female 447
Other contraceptives used in ferrets 448
Rabbit 449
Location and technique of placement of the gonadotrophin-releasing hormone agonist slow-release implant in rabbits 449
Male 449
Female 450
Other contraceptives used in rabbits 450
Guinea Pig 450
Location and technique of placement of the gonadotrophin-releasing hormone agonist slow-release implant in guinea pigs 451
Male 451
Female 451
Other contraceptives used in guinea pigs 452
Rat 452
Location and technique of placement of the gonadotrophin-releasing hormone gonadotrophin-releasing hormone agonist slow-rel ... 452
Male 452
Female 452
Other contraceptives used in rats 453
Mouse 453
BIRDS 453
Location and Technique of Placement of the Gonadotrophin-Releasing Hormone Agonist Slow-Release Implant in Birds 454
Male 454
Female 455
Other Contraceptives Used in Birds 456
REPTILES 456
Location and Technique of Placement of the Gonadotrophin-Releasing Hormone Agonist Slow-Release Implant in Reptiles 457
Lizards 457
Turtles 457
SUMMARY 459
REFERENCES 459
Update on Cancer Treatment in Exotics 465
Key points 465
INTRODUCTION 465
TUMOR STAGING 466
TM Approach 467
CLINICAL PATHOLOGY 468
Complete Blood Cell Count 468
Biochemistry 468
IMAGING MODALITIES 468
TREATMENT MODALITIES 469
TRANSLATING CANCER THERAPIES TO EXOTICS 470
Metabolism 470
Vascular Support, Renal/Hepatic Excretion 470
Risks of Corticosteroids and Immunosuppressive Agents 470
CHEMOTHERAPY 471
EMERGING MOLECULARLY TARGETED AGENTS 471
Tyrosine Kinase Inhibitors 482
Tumor Vaccines 488
RADIATION THERAPY IN EXOTIC SPECIES 488
External Beam Radiation 488
Definitive versus palliative protocols 489
Side effects and tolerance 489
Strontium 90 490
OTHER/MISCELLANEOUS THERAPY TYPES 490
Hormonal/Steroidal Therapies 490
Cryotherapy 490
Other Types of Therapy 491
TREATMENT STRATEGIES FOR TUMORS 491
NUTRITION/SUPPORTIVE CARE FOR EXOTIC CANCER PATIENTS 493
PATIENT MONITORING AND SIDE EFFECTS 494
Adverse Events 494
Assessing Response to Therapy 495
FUTURE DIRECTIONS 496
REFERENCES 496
Nontraditional Therapies (Traditional Chinese Veterinary Medicine and Chiropractic) in Exotic Animals 511
Key points 511
INTRODUCTION 511
INTRODUCTION TO TRADITIONAL CHINESE VETERINARY MEDICINE 512
Explanation of Traditional Chinese Veterinary Medicine Pattern Diagnosis 513
Explanation of Acupuncture 514
Explanation of Traditional Chinese Veterinary Medicine Food Therapy 517
Explanation of Traditional Chinese Veterinary Medicine Herbal Therapy 517
Cases That Could Benefit from Traditional Chinese Veterinary Medicine 518
Treatment Protocols 519
Side Effects, Precautions, and Contraindications 519
INTRODUCTION TO CHIROPRACTIC 520
Explanation of Chiropractic 522
Cases That Could Benefit from Chiropractic 523
Treatment Protocols 524
Side Effects, Precautions, and Contraindications 524
SUMMARY 526
REFERENCES 526