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Veterinarian-Reviewed Top 5 Prescription Pituitary and Antidiuretic Therapies for Dogs in Canada (2025), DDAVP, Vetoryl, Lysodren, Anipryl, Percorten-V: What Your Vet Wants You to Know

Published on Thursday, August 21, 2025

Medications targeting pituitary function and antidiuretic hormone pathways are prescription treatments used to manage conditions such as central diabetes insipidus, pituitary-dependent hyperadrenocorticism, and adrenal insufficiency in dogs. This category includes agents that replace deficient hormones, suppress excessive adrenal activity, or correct electrolyte and fluid balance. Canadian pet owners and veterinarians prioritize these therapies for their clear clinical goals: reduce dangerous polyuria and polydipsia, restore metabolic and electrolyte balance, and improve quality of life. Preferences in Canada are driven by demonstrated safety profiles, veterinarian endorsement, availability through licensed pharmacies, practical dosing regimens, and monitoring requirements that fit routine veterinary care. Cost, brand reputation, regional supply, and clear lab-based monitoring protocols also shape buying decisions in the Canadian market, making trusted, prescription-only options particularly appealing to responsible owners.

Quick Menu

1. Best Antidiuretic for Central Diabetes Insipidus

2. Best for Hyperadrenocorticism (Cushing's)

3. Best Adrenolytic Option for Cushing's Management

4. Best Adjunct for Pituitary-Related Disorders

5. Best Mineralocorticoid Replacement for Addison's

1
BEST ANTIDIURETIC FOR CENTRAL DIABETES INSIPIDUS

DDAVP Desmopressin Acetate Tablets

DDAVP Desmopressin Acetate Tablets

DDAVP is the go-to ADH replacement for canine central diabetes insipidus because it provides a highly specific vasopressin analog in an easy-to-dose oral tablet, enabling reliable control of polyuria/polydipsia with minimal systemic steroid or adrenal effects. Compared with adrenal-directed therapies on this list (trilostane, mitotane, DOCP), DDAVP targets the neurohypophyseal axis directly and usually delivers lower monitoring intensity and lower ongoing lab costs, making it a cost-efficient chronic option for ADH-deficient patients.

4.3
★★★★☆
  • Controls urination

  • Prevents dehydration

  • Controls urination

  • Prevents dehydration

Review Summary

85%

"Owners report a significant reduction in excessive drinking and urination with DDAVP tablets and improved quality of life; some note the need for dosing adjustments, cost concerns, or occasional variable response."

  • Pocket-tablet hero

  • Synthetic vasopressin analogue used to replace ADH in central diabetes insipidus.

  • Pocket-tablet hero

  • Synthetic vasopressin analogue used to replace ADH in central diabetes insipidus.

Increased Safety & Security

Time-Saving Convenience

DDAVP is the go-to ADH replacement for canine central diabetes insipidus because it provides a highly specific vasopressin analog in an easy-to-dose oral tablet, enabling reliable control of polyuria/polydipsia with minimal systemic steroid or adrenal effects. Compared with adrenal-directed therapies on this list (trilostane, mitotane, DOCP), DDAVP targets the neurohypophyseal axis directly and usually delivers lower monitoring intensity and lower ongoing lab costs, making it a cost-efficient chronic option for ADH-deficient patients.

  • Controls urination

  • Prevents dehydration

  • Pocket-tablet hero

  • Synthetic vasopressin analogue used to replace ADH in central diabetes insipidus.

  • Oral tablet formulation that is typically dosed multiple times daily with dose titration based on water intake and urine concentration.

  • Controls urination

  • Prevents dehydration

  • Pocket-tablet hero

  • Synthetic vasopressin analogue used to replace ADH in central diabetes insipidus.

  • Oral tablet formulation that is typically dosed multiple times daily with dose titration based on water intake and urine concentration.

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$40-120 CAD

2
BEST FOR HYPERADRENOCORTICISM (CUSHING'S)

Vetoryl Trilostane Capsules

Vetoryl Trilostane Capsules

Vetoryl is the market-leading trilostane capsule for canine hyperadrenocorticism because it reversibly inhibits steroidogenesis, allowing dose titration and predictable control of clinical signs without the adrenal destruction risk associated with mitotane. In practice Vetoryl often balances efficacy, safety and monitoring costs better than Lysodren for moderate-to-severe Cushing’s, and it is generally preferred over pituitary-directed drugs like selegiline when robust cortisol suppression is required.

4
★★★★☆
  • Lowers cortisol

  • Eases panting

  • Lowers cortisol

  • Eases panting

Review Summary

78%

"Most users find Vetoryl (trilostane) controls Cushing's signs effectively when doses are properly monitored; however it requires frequent bloodwork and some owners report side effects like lethargy or GI upset."

  • Vet-prescribed heavyweight

  • Trilostane is an adrenal steroid synthesis inhibitor commonly used to control cortisol production in Cushing's disease.

  • Vet-prescribed heavyweight

  • Trilostane is an adrenal steroid synthesis inhibitor commonly used to control cortisol production in Cushing's disease.

Increased Safety & Security

Time-Saving Convenience

Vetoryl is the market-leading trilostane capsule for canine hyperadrenocorticism because it reversibly inhibits steroidogenesis, allowing dose titration and predictable control of clinical signs without the adrenal destruction risk associated with mitotane. In practice Vetoryl often balances efficacy, safety and monitoring costs better than Lysodren for moderate-to-severe Cushing’s, and it is generally preferred over pituitary-directed drugs like selegiline when robust cortisol suppression is required.

  • Lowers cortisol

  • Eases panting

  • Vet-prescribed heavyweight

  • Trilostane is an adrenal steroid synthesis inhibitor commonly used to control cortisol production in Cushing's disease.

  • Usually given once daily (some cases twice); dosing requires individualized titration based on clinical response and ACTH stimulation testing.

  • Lowers cortisol

  • Eases panting

  • Vet-prescribed heavyweight

  • Trilostane is an adrenal steroid synthesis inhibitor commonly used to control cortisol production in Cushing's disease.

  • Usually given once daily (some cases twice); dosing requires individualized titration based on clinical response and ACTH stimulation testing.

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$150-500 CAD

3
BEST ADRENOLYTIC OPTION FOR CUSHING'S MANAGEMENT

Lysodren Mitotane Tablets

Lysodren Mitotane Tablets

Lysodren (mitotane) remains a best-in-class cytotoxic adrenal suppressant for dogs with severe Cushing’s because of its potent, sometimes durable adrenal-ablative effect and comparatively low per-unit drug cost. That potency gives it an economic advantage in acquisition cost, but it carries higher short-term monitoring and complication risks than trilostane and may produce higher downstream veterinary and hospitalization expenses when intensive induction protocols are required.

3.6
★★★☆☆
  • Adrenal cell targeting

  • Reduces Cushing signs

  • Adrenal cell targeting

  • Reduces Cushing signs

Review Summary

68%

"Lysodren (mitotane) is effective for many dogs but has a narrow therapeutic window and a higher risk of GI and neurologic side effects during induction, leading to mixed long-term experiences among owners."

  • Old-school adrenal buster

  • Mitotane (Lysodren) produces selective adrenocortical necrosis and is used for medical adrenalectomy in Cushing's disease.

  • Old-school adrenal buster

  • Mitotane (Lysodren) produces selective adrenocortical necrosis and is used for medical adrenalectomy in Cushing's disease.

Increased Safety & Security

Time-Saving Convenience

Lysodren (mitotane) remains a best-in-class cytotoxic adrenal suppressant for dogs with severe Cushing’s because of its potent, sometimes durable adrenal-ablative effect and comparatively low per-unit drug cost. That potency gives it an economic advantage in acquisition cost, but it carries higher short-term monitoring and complication risks than trilostane and may produce higher downstream veterinary and hospitalization expenses when intensive induction protocols are required.

  • Adrenal cell targeting

  • Reduces Cushing signs

  • Old-school adrenal buster

  • Mitotane (Lysodren) produces selective adrenocortical necrosis and is used for medical adrenalectomy in Cushing's disease.

  • Therapy involves an induction (higher dose) phase followed by a maintenance phase with careful dose adjustment.

  • Adrenal cell targeting

  • Reduces Cushing signs

  • Old-school adrenal buster

  • Mitotane (Lysodren) produces selective adrenocortical necrosis and is used for medical adrenalectomy in Cushing's disease.

  • Therapy involves an induction (higher dose) phase followed by a maintenance phase with careful dose adjustment.

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$100-300 CAD

4
BEST ADJUNCT FOR PITUITARY-RELATED DISORDERS

Anipryl Selegiline Tablets

Anipryl Selegiline Tablets

Anipryl (selegiline) is a selective monoamine oxidase B inhibitor used for pituitary-dependent disease modulation and cognitive dysfunction in dogs; it is valued for its oral convenience, favorable safety profile, and relatively low price for mild-to-moderate pituitary-driven signs. While less potent than trilostane or mitotane for controlling overt hypercortisolism, Anipryl can be an economically sensible first-line or adjunct therapy for early PDH or when neurobehavioral benefits are desired without aggressive adrenal suppression.

3.9
★★★☆☆
  • Boosts alertness

  • Sharpened cognition

  • Boosts alertness

  • Sharpened cognition

Review Summary

72%

"Anipryl (selegiline) produces noticeable behavioral improvements for many dogs with cognitive dysfunction or as an adjunct in Cushing's, though effects can be subtle and variable; side effects are uncommon but may include insomnia or GI upset."

  • Memory pep-up

  • Selegiline (Anipryl) is a selective MAO-B inhibitor used for canine cognitive dysfunction and as an adjunct in some pituitary-driven Cushing's cases.

  • Memory pep-up

  • Selegiline (Anipryl) is a selective MAO-B inhibitor used for canine cognitive dysfunction and as an adjunct in some pituitary-driven Cushing's cases.

Self-Improvement & Personal Growth

Anipryl (selegiline) is a selective monoamine oxidase B inhibitor used for pituitary-dependent disease modulation and cognitive dysfunction in dogs; it is valued for its oral convenience, favorable safety profile, and relatively low price for mild-to-moderate pituitary-driven signs. While less potent than trilostane or mitotane for controlling overt hypercortisolism, Anipryl can be an economically sensible first-line or adjunct therapy for early PDH or when neurobehavioral benefits are desired without aggressive adrenal suppression.

  • Boosts alertness

  • Sharpened cognition

  • Memory pep-up

  • Selegiline (Anipryl) is a selective MAO-B inhibitor used for canine cognitive dysfunction and as an adjunct in some pituitary-driven Cushing's cases.

  • Oral, usually once-daily dosing with effects that may take weeks to manifest for behavior or endocrine modulation.

  • Boosts alertness

  • Sharpened cognition

  • Memory pep-up

  • Selegiline (Anipryl) is a selective MAO-B inhibitor used for canine cognitive dysfunction and as an adjunct in some pituitary-driven Cushing's cases.

  • Oral, usually once-daily dosing with effects that may take weeks to manifest for behavior or endocrine modulation.

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$40-120 CAD

5
BEST MINERALOCORTICOID REPLACEMENT FOR ADDISON'S

Percorten-V DOCP Injection

Percorten-V DOCP Injection

Percorten-V (DOCP) injection is the standard long-acting mineralocorticoid replacement for canine hypoadrenocorticism, delivering predictable monthly electrolyte control and removing the need for daily oral mineralocorticoid dosing. Its technical advantage is a dependable, clinic-administered depot effect that reduces owner pill burden and stabilizes sodium/potassium ratios, which—despite requiring periodic veterinary visits—often lowers long-term monitoring variability and overall management costs compared with daily oral alternatives.

4.5
★★★★☆
  • Stabilizes electrolytes

  • Long-lasting injection

  • Stabilizes electrolytes

  • Long-lasting injection

Review Summary

90%

"Percorten-V (DOCP) injections are widely praised for reliably managing Addison's disease with monthly dosing and predictable clinical improvement; owners appreciate the effectiveness though they mention cost and the need for periodic electrolyte monitoring."

  • Monthly lifesaver

  • DOCP (Percorten-V) is a long-acting injectable mineralocorticoid used to replace aldosterone in primary hypoadrenocorticism.

  • Monthly lifesaver

  • DOCP (Percorten-V) is a long-acting injectable mineralocorticoid used to replace aldosterone in primary hypoadrenocorticism.

Increased Safety & Security

Time-Saving Convenience

Percorten-V (DOCP) injection is the standard long-acting mineralocorticoid replacement for canine hypoadrenocorticism, delivering predictable monthly electrolyte control and removing the need for daily oral mineralocorticoid dosing. Its technical advantage is a dependable, clinic-administered depot effect that reduces owner pill burden and stabilizes sodium/potassium ratios, which—despite requiring periodic veterinary visits—often lowers long-term monitoring variability and overall management costs compared with daily oral alternatives.

  • Stabilizes electrolytes

  • Long-lasting injection

  • Monthly lifesaver

  • DOCP (Percorten-V) is a long-acting injectable mineralocorticoid used to replace aldosterone in primary hypoadrenocorticism.

  • Administered by deep IM or SC injection approximately every 25–30 days with concurrent glucocorticoid management as indicated.

  • Stabilizes electrolytes

  • Long-lasting injection

  • Monthly lifesaver

  • DOCP (Percorten-V) is a long-acting injectable mineralocorticoid used to replace aldosterone in primary hypoadrenocorticism.

  • Administered by deep IM or SC injection approximately every 25–30 days with concurrent glucocorticoid management as indicated.

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$100-350 CAD

What the Research Says About Pituitary and Antidiuretic Therapies

Veterinary clinical studies, consensus guidelines, and retrospective case series provide the basis for current prescribing practices. Evidence supports using desmopressin for central diabetes insipidus, trilostane or mitotane for controlling hyperadrenocorticism, selegiline in selected pituitary or neurobehavioral cases, and DOCP injections for mineralocorticoid replacement in primary hypoadrenocorticism. Research emphasizes individualized dosing, regular laboratory monitoring, and collaborative care between owners and veterinarians to optimize outcomes and minimize adverse effects.

Desmopressin (DDAVP) has been shown in clinical reports and case series to reduce urine volume and restore normal urine concentration in dogs with central diabetes insipidus when dosed and monitored appropriately.

Trilostane (Vetoryl) is supported by multicenter studies and clinical experience as an effective, reversible medical option for pituitary-dependent and adrenal-dependent hyperadrenocorticism, with outcomes highly dependent on careful titration and ACTH stimulation testing.

Mitotane (Lysodren) produces targeted adrenal cytotoxic effects and remains a validated option for hyperadrenocorticism; comparative studies point to similar efficacy to trilostane in many cases but with different monitoring demands and potential for more abrupt adrenal suppression.

Selegiline (Anipryl) has evidence for use in canine cognitive dysfunction and selected pituitary-linked conditions; response rates vary and benefit is often modest, making patient selection important.

DOCP injections (Percorten-V) are considered the gold standard for mineralocorticoid replacement in primary hypoadrenocorticism, providing consistent control of sodium and potassium when dosed and monitored by electrolyte testing.

Consensus guidelines from veterinary internal medicine specialists emphasize baseline and follow-up testing including ACTH stimulation or cortisol assays, serum electrolytes, and urine specific gravity as essential components of safe therapy management.

In Canada, prescription pituitary and antidiuretic therapies are central to managing endocrine disorders in dogs. The five main options covered here are DDAVP Desmopressin Acetate Tablets, Vetoryl Trilostane Capsules, Lysodren Mitotane Tablets, Anipryl Selegiline Tablets, and Percorten-V DOCP Injection. For pituitary-driven cortisol disorders, Vetoryl Trilostane Capsules represent the best overall choice among these five because of their reversible action, broad clinical support, and adaptable monitoring protocols; however, DDAVP remains first-line for central diabetes insipidus, and Percorten-V is preferred for mineralocorticoid replacement. We hope you found the information you were looking for. You can refine or expand your search using the site search to look up dosing guidance, monitoring checklists, or availability at Canadian pharmacies.

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