Lasix Drug Handout
What is Lasix?
Lasix is a diuretic (water pill). It helps the body get rid of water by increasing the kidneys production of urine.
- Most important medication in the treatment of congestive heart failure
- To treat fluid accumulation for reasons other than heart failure
- Some forms of acute kidney failure
- Elevated blood calcium levels
- Used at low dosages in some dogs with chronic bronchitis
Please contact CVCA should any of these symptoms be noted
- Increased thirst and urination (please contact us if this is not manageable)
- Can cause dehydration in patients not drinking well, or with other diseases that cause fluid loss (kidney disease, vomiting/diarrhea)
- May decrease levels of calcium, sodium, potassium, or magnesium, particularly In patients that are not eating well.
- Low risk to increase blood sugar levels, altering the insulin need in diabetics
- May cause low blood pressure and weakness in patients with pericardial effusion
- Can be given with or without food
- Almost never used alone in the treatment of congestive heart disease
- Can be given in pill form, liquid or made into chewable treats
- Do not stop or lower the dose without the approval of a veterinarian
- Monitor kidney values and electrolytes through blood work after starting or increasing the dose, and at least every 6 months thereafter
- Often used in combination with an ACE inhibitor and/or spironolactone, decreasing the risk for low potassium
Interaction with Other Drugs
- May lower blood pressure when combined with drugs that result in vasodilation (ACEi, amlodipine, diltiazem)
- May increase risk for hearing loss when used with gentamicin or amikacin
- Increases blood levels of aspirin, theophylline
Standard Dosage Forms
- Lasix Oral Tablets – 12.5 mg and 50 mg (Veterinary Only), 20 mg, 40 mg, 80 mg
- Lasix Oral Solution – 10 mg/ml
Synonyms: (Lasix, Furosemide, Salix)
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