Vetoryl® is a cornerstone prescription medication used by veterinarians to manage hyperadrenocorticism, commonly known as Cushing’s Disease, in both dogs and cats. If your pet has been diagnosed with this condition, understanding how this medication works, its potential side effects, and the necessary monitoring protocols is essential for their long-term health. This guide provides a comprehensive overview of Vetoryl®, ensuring you have the information needed to partner effectively with your veterinarian.
What Is Vetoryl®?
Vetoryl® is a prescription medication specifically formulated to treat hyperadrenocorticism (Cushing’s Disease) in dogs and cats. This condition occurs when the adrenal glands produce excessive amounts of cortisol, a naturally occurring steroid that is vital for the body’s stress response and metabolism. When overproduced, cortisol can lead to a range of debilitating symptoms.
While Vetoryl® is the brand name, the active pharmaceutical ingredient is trilostane. In some cases, a veterinarian might prescribe a compounded formulation of trilostane. Compounded medications are customized versions created when an FDA-approved drug is not suitable—for example, if your pet has difficulty swallowing capsules, requires a specific dosage not commercially available, or has an allergy to an ingredient in the brand-name version. It is important to note that compounded medications are not FDA-approved, and their effectiveness can vary. Always discuss with your veterinarian to determine the safest and most effective option for your pet.
How Vetoryl® Works
Vetoryl® functions as an enzyme inhibitor. It works by temporarily suppressing the enzymes responsible for producing cortisol in the adrenal glands. By reducing the overproduction of cortisol, the medication helps control the clinical signs associated with Cushing’s Disease, such as excessive thirst and urination, increased appetite, hair loss, and a pot-bellied appearance.
It is crucial to understand that Vetoryl® does not cure Cushing’s Disease. Instead, it serves as a lifelong management tool designed to improve your pet’s quality of life by keeping cortisol levels within a healthier, more balanced range.
Administration Instructions
Proper administration of Vetoryl® is critical for both safety and efficacy.
- Dosing Schedule: The medication is typically administered once daily. However, depending on your pet’s individual response to treatment, your veterinarian may recommend dividing the dose to twice daily.
- With Food: Vetoryl® must be given with food. Administration with a meal significantly enhances the absorption and effectiveness of the drug.
- Consistency: Do not stop or alter the dosage schedule without explicit instructions from your veterinarian.
Missed a Dose?
If you miss a dose, give it as soon as you remember. However, if it is almost time for your next scheduled dose, skip the missed dose and return to your regular schedule. Do not give extra or double doses to make up for a missed one.
Potential Side Effects
Because Vetoryl® works by lowering steroid levels, it can sometimes cause cortisol to drop too low, leading to a serious condition known as an Addisonian crisis. Recognizing the signs of this crisis is essential for your pet’s safety.
Contact your veterinarian immediately if you observe any of the following symptoms:
- Vomiting
- Lethargy (decreased energy levels)
- Anorexia (lack of appetite)
- Weakness
- Diarrhea, particularly if it contains blood
- Collapse
Human Side Effects and Safety
Vetoryl® is not approved for use in humans and can be hazardous, especially to pregnant women or those trying to conceive.
- Wear gloves during administration to avoid skin contact.
- If you do not wear gloves, wash your hands thoroughly with soap and water after handling.
- Do not open or split the capsules.
- If accidental ingestion occurs, contact your physician or the national Poison Control Center at 800-222-1222 immediately.
Monitoring and Testing
Specific monitoring is a mandatory part of treatment with Vetoryl®. To ensure the medication is working safely and effectively, your veterinarian will recommend an ACTH stimulation test 10 to 14 days after starting therapy. This test measures how well the adrenal glands are responding.
Based on the results, your veterinarian may adjust the dosage. Following the initial adjustment, routine monitoring is typically recommended every 1 to 3 months, depending on your pet’s individual needs, concurrent medications, and overall stability.
What to Do in Case of Overdose
An overdose of Vetoryl® can cause severe suppression of the adrenal glands, leading to life-threatening symptoms.
Signs of an overdose may include:
- Severe lack of appetite
- Extreme lethargy
- Weight loss
- Bloody diarrhea
- Muscle tremors
- Collapse
If you suspect an overdose, seek veterinary care immediately. You can also contact an animal poison control center. Consultation fees may apply.
- Pet Poison Helpline: (855) 764-7661
- ASPCA Animal Poison Control: (888) 426-4435
Proper Storage
To maintain the potency of Vetoryl®:
- Store capsules at controlled room temperature (77°F), with brief exposure permitted between 59-86°F.
- Keep the container tightly closed to protect the medication from moisture and light.
- For compounded trilostane formulations, follow the storage instructions provided by the compounding pharmacy.
- Always keep this medication out of reach of children and other pets.
Frequently Asked Questions
How long does it take for Vetoryl® to work in dogs?
Vetoryl® begins to work within 1 to 2 days to lower cortisol production. However, observable clinical improvements—such as reduced thirst, normalized appetite, and increased energy—may take several weeks to become apparent as the body adjusts to the new hormone balance.
Conclusion
Managing Cushing’s Disease requires a dedicated partnership between you and your veterinarian. Vetoryl® (trilostane) is a highly effective tool for managing this condition, helping to alleviate uncomfortable symptoms and restore a better quality of life for your pet. Adherence to dosing instructions, vigilance for side effects, and strict adherence to the recommended monitoring schedule are the keys to safe and successful treatment. If you have any concerns or notice changes in your pet’s behavior or health, do not hesitate to reach out to your veterinary team.
References
- Dechra Veterinary Products. (2021). Vetoryl® (trilostane) Full Prescribing Information.
- Pet Poison Helpline. Toxicology Information for Veterinary Professionals.
- ASPCA Animal Poison Control Center. Emergency Resources.
- Featured Image: iStock.com/AegeanBlue