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Important Disclaimer
These statements have not been evaluated by the Food and Drug Administration (FDA). Compounded products are not FDA-approved and are not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary. The information provided is for educational purposes only and should not be considered medical advice. Always consult with your healthcare provider before starting any new treatment.
Clinical Information
Evidence-based details for healthcare providers
Use exactly as your veterinarian directs. Shake the suspension as instructed and measure it with the oral syringe supplied or recommended for your pet. Give it gently so the animal can swallow. Do not use a household spoon, force liquid into a struggling pet, or change products on your own. Ask what to do if your pet spits it out, vomits, or misses a dose.
Atenolol blocks beta-1 receptors in the heart, reducing the response to stress hormones such as adrenaline. This can slow heart rate and reduce the force of contraction. Your veterinarian evaluates whether those changes fit your pet's particular heart condition.
Do not give it to a pet with a known allergy to atenolol or the liquid's ingredients. A very slow pulse, low blood pressure, heart block, or uncontrolled heart failure requires veterinary assessment. Tell the veterinarian about breathing disease, kidney problems, diabetes, pregnancy, or nursing.
Tell your veterinarian about all heart medicines, especially diltiazem, digoxin, sotalol, and other beta blockers. Some combinations can slow the heart excessively. Review insulin, blood pressure medicines, supplements, and planned anesthesia as well. Do not stop another prescription without veterinary guidance.
Unusual tiredness, weakness, poor appetite, or stomach upset may occur. Report a change in activity or breathing to your veterinarian. Collapse, difficulty breathing, extreme weakness, or a suspected overdose needs urgent veterinary care. A very slow heartbeat or low blood pressure may require a treatment change.
Follow the storage directions and beyond-use date on your prescription label. Keep the medicine in its labeled container, out of reach of children and pets. Ask the pharmacist about disposal.
[FDA: Questions on compounded animal medicines](https://www.fda.gov/animal-veterinary/animal-drug-compounding/qa-gfi-256-compounding-animal-drugs-bulk-drug-substances)
[PubMed: ACVIM consensus guidance on cardiomyopathies in cats (2020)](https://pubmed.ncbi.nlm.nih.gov/32243654/)
[DailyMed: Tenormin atenolol tablets human label](https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=6e850b1e-28a4-4ff8-8ed7-bb0b29faa28a)
Frequently Asked Questions
Why is atenolol prescribed for cats or dogs?
Veterinarians may prescribe it for selected fast heart rhythms or heart muscle conditions. It is not appropriate for every pet with heart disease. The diagnosis and heart function guide use and monitoring.
What if my pet spits out atenolol or vomits?
Do not automatically repeat the medicine because you may not know how much your pet swallowed. Ask your veterinarian for instructions. Keep a note of what happened and when it occurred.
Can I stop my pet's atenolol suddenly?
Do not change or stop it without your veterinarian's guidance. The heart may respond to an abrupt change. If your pet is ill or refusing medicine, seek instructions for the next step.
Is this FDA-approved?
No. This compounded medicine is prepared for one animal on a veterinarian's prescription. It is not FDA-approved, and FDA does not review it for safety or effectiveness before it is made. Separately, FDA-approved atenolol tablets treat high blood pressure, angina, and certain heart attack patients in humans. That approval does not cover this pet suspension.
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