Benazepril Gel

Benazepril Gel
Usage
Benazepril gel is a compounded topical or transdermal formulation of an angiotensin-converting enzyme (ACE) inhibitor. While benazepril is typically administered orally for cardiovascular conditions, a gel formulation may be prepared for specialist-directed use when an alternative route of administration is required.
Potential uses may include:
• Transdermal delivery in patients unable to tolerate oral medications
• Situations requiring individualised dosing or alternative administration routes
• Certain veterinary applications, particularly in animals where oral dosing is difficult
• Practitioner-directed use for cardiovascular or renal conditions
Use should be under the supervision of a qualified healthcare professional.

Dosage
Dosage and frequency should be determined by the prescribing practitioner based on the patient’s condition, weight, and clinical response.
Typical dosing considerations include:
• Apply a measured amount of gel to clean, intact skin, usually once or twice daily, or as directed
• Application sites may include areas suitable for transdermal absorption (e.g., inner ear in veterinary patients or other recommended sites)
• Hands should be washed after application unless they are the treatment area
• Avoid application to broken or irritated skin
Patients should follow the specific instructions provided by their healthcare provider.

Mechanisms of Action
Benazepril is an ACE inhibitor that reduces blood pressure and improves cardiovascular function.
Its mechanisms include:
Inhibition of angiotensin-converting enzyme (ACE)
Benazepril (after conversion to its active form, benazeprilat) inhibits ACE, reducing the formation of angiotensin II, a potent vasoconstrictor.
Vasodilation
Reduced angiotensin II levels lead to relaxation of blood vessels, lowering blood pressure.
Reduction in aldosterone secretion
This decreases sodium and water retention, contributing to reduced blood volume.
Improved cardiovascular and renal function
ACE inhibition can help reduce workload on the heart and support kidney function in certain conditions.
When administered transdermally, the drug is absorbed through the skin and exerts systemic effects.

Contraindications
Benazepril gel should not be used in patients with:
• Hypersensitivity to benazepril or other ACE inhibitors
• History of angioedema associated with ACE inhibitor therapy
• Pregnancy, particularly in the second and third trimesters
• Known allergy to any component of the formulation

Precautions
Benazepril gel should be used with caution in patients with:
• Hypotension or volume depletion
• Renal impairment, including renal artery stenosis
• Electrolyte imbalances, especially hyperkalaemia
• Cardiovascular disease requiring monitoring
Additional considerations include:
• Monitor for signs of systemic absorption, such as dizziness or low blood pressure
• ACE inhibitors may cause persistent dry cough in some patients
• Rare but serious reactions such as angioedema may occur
• Patients should seek medical advice if they experience swelling of the face, lips, tongue, or difficulty breathing

Storage
• Store below 25°C unless otherwise directed
• Keep the container tightly closed when not in use
• Protect from heat, moisture, and direct light
• Do not freeze unless specifically instructed
• Keep out of reach of children and pets
Patients should follow the storage instructions provided on the dispensing label supplied by the pharmacy.