September 19, 2021

Lasix Side Effects

Lasix is often prescribed to patients who suffer from edema, renal disease, heart problems, hypertension or cirrhosis. As a treatment for hypertension, Lasix can be prescribed alone or with other medication options.


Before taking Lasix, individuals should always tell their pharmacist or doctor if they have allergies to any drugs. Some inactive ingredients in the medication may also cause allergic reactions so patients should always tell their doctor if they have allergies to anything. This medication can also cause other issues so patients should tell their doctor if they have diabetes, lupus, liver problems or kidney disorders. Taking Lasix may also reduce the levels of potassium in the blood so patients with heart problems may have to take an additional supplement or eat special foods.

Lasix Side Effects

Patients who are on Lasix may develop muscle pain, vomiting or feelings of weakness. They may feel light headed, restless or fatigued. Some patients may also suffer from swelling of the throat, lips, face or tongue. On occasion, Lasix can change the amount of urine or create an irregular heartbeat. In certain cases, patients have reported easy bleeding, unusual bruises, thirst or dry mouth.

Overall, patients may experience any of the following side effects of laxix:

– Gastrointestinal problems
– Systemic vacuities
– Allergic reactions
– Hyperglycemia
– Photosensitivity
– Abdominal cramps or pain
– Dizziness
– Pruritis
– Anemia
– Restlessness
– Diarrhea
– Vomiting
– Interstitial nephritis
– Headaches
– Weakness
– Nausea
– Rashes
– Hypotension
– Dermatitis
– Higher cholesterol levels
– Swelling
– Jaundice
– Fever
– Pancreatitis
– Blurred vision
– Tinnitus or hearing problems
– Urticaria
– Urinary problems


When used with certain antibiotics, Lasix may increase the risk of renal problems. It should also not be used with ethacrynic acid or cisplatin because of the possibility of toxicity. When used with lithium, Lasix may cause lithium toxicity. Lasix can function as a diuretic and make it so lithium is not processed through the body correctly.

Patients who are taking Lasix should make sure to drink plenty of water to prevent dehydration. If the patient becomes dehydrated, it can cause an embolism or circulatory collapse. Signs of dehydration may include dry mouth, fatigue, muscle cramps, nausea or thirst. Some patients who are dehydrated may also experience muscle weakness, restlessness or cardiac arrhythmia.

Laboratory Testing for Lasix Patients

To prevent negative side effects, patients should regularly be tested for their serum electrolyte levels and CO2. Most doctors will do laboratory tests on the patient in the first few months of treatment to make sure the patient does not have any adverse reactions. Diabetics who take Lasix may also have their urine and blood glucose checked to ensure the medication is not causing any harm.

Pregnant and Nursing Mothers

The FDA lists Lasix in pregnancy category C. This medication has been shown to cause maternal deaths and miscarriages during animal testing. Since Lasix is normally not given to pregnant women, the effects on human fetuses or mothers are unknown. Pregnant or breastfeeding women should only take Lasix if their doctor determines that the benefits outweigh any risks.

Children who are under the age of 4 may develop nephrolithiasis or other disorders. If children are given Lasix, they should be monitored to ensure renal function is optimal. When this medication is used on infants, it may cause patent ductus arteriosus. Elderly patients should also use caution when taking this drug. Doctors will normally start elderly individuals out on a lower dosage to ensure that there will not be negative side effects.

Patients should always tell their doctor about any allergies or medical conditions before taking Lasix. They should also disclose any prescription drugs, herbal supplements or over-the-counter drugs that they are taking. If a patient experiences any side effects, they should immediately see their doctor. In the case of an allergic reaction, patients should seek emergency care immediately.