Spironolactone Tablets

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$9.99 to $154.99


Spironolactone is a potassium-sparing diuretic that can be used in a variety of animals including dogs, horses, and cats. Spironolactone was initially used in humans under the brand name Aldactone, and can be used in animals to treat high blood pressure, edema, and congestive heart failure. Spironolactone can also be used to treat conditions involving potassium deficiency.


  • A diuretic (water pill) that treats a variety of conditions.
  • Originally a human drug, which means it has been around for a long time and its side effects are relatively well understood.
  • Preserves potassium, which can be a problem with other diuretics.
  • Small pill is easy to administer.
  • Requires a prescription from your veterinarian.


  • Small pill can be hidden inside your animal’s food.
  • Give as directed by your veterinarian.


Prescription Drug Policy:

Prescriptions CAN NOT be shipped to North Carolina, Hawaii or Alaska at this time.

Prescription drugs can only be shipped upon receipt of an original prescription from a licensed veterinarian. FarmVet can accept an original prescription in one of the following ways:
  • The original prescription may be mailed to:
    1254 Old Hillsboro Rd, Franklin,TN 37069 
  • A licensed veterinarian may fax the Rx to 615-370-8502.
    The fax must originate from the veterinarian's office.
  • A licensed veterinarian can call & leave a voicemail with your prescription information with our pharmacy at 615-277-5602.

Prescriptions are non-refundable. Prescriptions are refillable if indicated by your vet, for up to one year from the original date. At the end of one year, prescriptions must be updated. Written prescriptions must include the veterinarian's license number, telephone number, and address. Federal law restricts the use of Rx drugs to use by, or on the order of a licensed veterinarian.


  • Make sure your veterinarian knows all the other medications your animal is on, as spironolactone can increase the potency of some other medications.
  • Do not use in animals with kidney problems, hyperkalemia, or Addison’s disease. 
  • Be cautious in using spironolactone in pregnant animals, as some side effects have been reported in humans.
  • Do not give potassium supplements while your animal is on this medication.
  • Spironolactone can cause dehydration or an imbalance in electrolytes.
  • Other side effects may occur with high dosage, including loss of appetite and gastrointestinal distress - be vigilant and report any side effects to your veterinarian.

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