Since it's likely your dog is already seriously ill if taking Lasix, call It works by preventing the body from absorbing potassium, sodium and. Mina's 13 - not young, but she's a small dog and their lifespans are longer - and would be fine for years, they explained, if the medicine worked. Brand Name: Lasix, Salix, Disal. Available in 8 or 10 mg/ml oral solution; mg , 20 mg, 40 mg, 50 mg & 80 mg tablets; and injectable. Your continued use of the Sites and the services and products therein after any modifications or amendments are posted constitutes your acceptance of the modifications or amendments. Mina's what I'd call a legendary dog. Lasix will make your dog thirsty, so even though it gets rid of fluid, your dog will probably drink and urinate more than usual. Estrous Cycle Control in Mares. Many dogs have heart murmurs particularly middle aged to older small breed dogs with chronic degenerative valve diseasebut a heart murmur and cough or labored breathing does not equal heart failure. Calming Drugs for Horses. Neonatal Isoerythrolysis in Foals. Plasma Cell Stomatitis in Cats. The medication helps get rid of excess fluid resulting in "milk," helping to alleviate the condition. Another group of drugs called positive inotropes may also be administered in certain cases to increase the force with which the heart muscle beats increased vigor of contractionallowing it to pump more blood forward to the lungs and the rest of the body.