Compounded Furosemide (Lasix) For Dogs, Cats & Other Pet Animals

Furosemide is a medication used in humans and animals to help treat high blood pressure. It is used in disorders that are associated with excessive water such as heart failure, lung disease, end-stage liver disease, and excessive fluid buildup in tissues. It is important to remember that even though the medication takes effect within as little as 1-2 hours after being given, the true benefits of the medication to your animal’s health may not be seen outwardly. Your veterinarian may require routine tests in order to monitor the level of effectiveness. Furosemide does require a prescription from your veterinarian in order to be dispensed. You and your veterinarian should discuss if this is the best option for your pet.

Furosemide is given orally or by transdermal route and can be compounded to the desired strength and flavor that best suits your patient/pet. We compound this medication into suspensions, capsules, and transdermal creams. This medication may be given with or without food. If the patient vomits after receiving the dose on an empty stomach, the next dose should be given with food to decrease GI upset. Often this medication causes an increase in urination, therefore it is best to take it in the morning to help avoid bedtime urination. If you miss a dose do not double up on the medication. Wait until the next dose is due and follow the normal dosing schedule as directed.

Common side effects of furosemide include increased urination, vomiting and diarrhea. If the patient experiences a slow heartbeat, collapsing/fainting, hearing problems, or lack of urination please contact your veterinarian/doctor immediately as these symptoms may indicate a serious reaction or a dose that is too high. Overdoses of this medication can be serious. If you suspect an overdose, contact your veterinarian or poison control.