Tired on Lasix for CHF

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Tired on Lasix for CHF

This is a discussion on Tired on Lasix for CHF within the Dog Health forums, part of the Keeping and Caring for Dogs category; My baby boy was recently diagnosed with congestive heart failure and put on lasix. This is all new for us as our boy has always ...

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Old 06-03-2017, 08:01 AM
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Tired on Lasix for CHF

My baby boy was recently diagnosed with congestive heart failure and put on lasix. This is all new for us as our boy has always been extremely healthy. I just wonder if anyone has experience with their dog being really tired on lasix.
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Old 06-03-2017, 10:46 AM
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My guess would be the fatigue would more closely related to the congestive heart failure. Check with your Vet to be sure.
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Old 06-03-2017, 01:11 PM
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I did check with the vet, but I got little more than a shoulder shrug, like "I don't know". So I'm leaning on community support from people who have gone through this before.
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Old 06-03-2017, 01:42 PM
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The fatigue is from the heart and not the drug. One of the first symptoms we see with congestive heart problems is loss of cardiac reserve. This means that the heart lacks the ability to provide blood/oxygen to the tissue with exercise. This can mean just walking across the floor. The Lasix is a diuretic that works by removing fluid from the chest or abdomen due to poor heart function.. Is your dog on any medication to support the heart itself? If not, you might want to ask the vet about Enalapril which helps the heart directly. I also like to use Coenzyme Q10 and Hawthorne Berry supplements for heart support. The dosage is one adult human is the same as an 80 pound dog. So, you just need to extrapolate from there. If there is a holistic vet in your area, you might consult with him/her. There are some great Chinese herbs to support the heart. Good luck and if your vet is giving you the cold shoulder, change vets. Heart problems are extremely serious and should not be put on the back burner.
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Old 06-03-2017, 06:55 PM
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Can't too much potassium being leached by the lasix also cause tiredness?
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Old 06-03-2017, 09:01 PM
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I'm would venture to guess that lethargy can be caused by too many nutrients being pulled from the body by the diuretic, but low potassium levels would be see on your dog's blood work. He has heart failure, so your dog is going to tire more easily. Unfortunately, this is just what happens with this disease. My dog lived with heart failure for 7 months and he slept a lot. Most doctors encourage rest so that the heart doesn't get overworked, which could lead to another bout of heart failure. I was told that with proper medication, a dog can be pulled out of heart failure once successfully. However, pulling them out a second time is much harder. Has your dog had a CBC with urinalysis checked recently? It's very important that Lasix be taken as directed to ensure fluid does not build up around the chest. I do not recommend taking him off the lasix, as this could lead to more serious problems. Best of luck.
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Old 06-04-2017, 07:46 AM
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Our situation is a little strange. He was rushed to a medvets hospital on an emergency call. No one performed a urinalysis at the time but sent us home with lasix nonetheless. It was thought he might not survive the trip home. Our local vet, meanwhile, was contacted to help with the correct dose of lasix. We got shoved back on medvets again, who then shoved us back on our local vet, who then prescribed 100mg three times daily. Our boy was already on 80 three times daily and had seen marked improvement from his previous condition, so we were loath to bump up the amount. We expected our vet to do a urinalysis to help get a correct dose. Right now he's just going off our boy's weight, which I know is wrong. I kind of just feel like our vet just doesn't care. He's a country vet and a bit cold. We did lower the dosage to 75mg three times a day and he does seem more alert.

I was just wondering if anyone whose pet had been on the diuretic had ever had a little relapse from too much lasix, and had to be lowered a bit. I've heard there is an adjustment period where the dose is trying to be regulated.

Anyone's experience with lasix would be appreciated really. As our situation is so bizarre, any information about how this should have been prescribed is useful. I don't even know what to expect from our vet, so I can't even be upset with him. I haven't a clue.
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Old 06-04-2017, 08:24 AM
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I would strongly urge you push for a blood panel and urinalysis. I would also suggest trying to find a cardiologist who can do an ultrasound of your pup's heart to see what sort of heart failure he has. I drove over an hour for our dog's cardiologist, and it was more than worth the trip, as he was able to properly tailor his meds. There are also more than two types of medications that can assist with heart failure management. I would ask about pimobendan. It's a chewable pill that helps as well.
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Old 06-04-2017, 10:14 AM
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you have a huge dog I am assuming? 100mg 3x a day is a whopping dose of Furosemide (Lasix)... maybe a dose for a 100-150 lb dog? You can use that dose for a smaller dog if it's literally drowning in its fluids, but only for a short period.

Potassium loss can indeed cause extreme lethargy and muscle weakness, but so can cardiomyopathy (a dose that high is probably for a large dog and large dogs generally have cardiomyopathy rather than simple heart failure). Usually potassium loss from Furosemide takes weeks to occur to the degree it will cause physical problems, though. Not sure how long your pet has been on Furosemide. There are potassium sparing diuretics that might be more appropriate IF this is the problem (such as Spironolactone).

By the way, weight IS the main consideration when prescribing Furosemide, though dose can obviously be varied depending upon severity... but a maintenance dose is almost always based solely upon weight.

Definitely need more information on this case to say much more about what should be done, altered etc. Your pet definitely needs an Echocardiogram by a cardiologist, and then a real diagnosis can be made and more accurate dosing and proper medications can be suggested. Short of that, it's really a lot of guessing no matter how experienced the veterinarian is.
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