Lasix vs Viagra Professional: side-by-side comparison
Lasix (Diuretics) and Viagra Professional (Erectile Dysfunction (ED)) belong to different therapeutic classes and are rarely interchangeable. This page compares the medications' purposes, mechanisms and the situations where each is used.
| Property | Lasix | Viagra Professional |
|---|---|---|
| Active ingredient | Furosemide | Sildenafil Citrate |
| Manufacturer | Sanofi | Pfizer |
| Class | Diuretics | Erectile Dysfunction (ED) |
| Strengths | 20mg, 40mg, 100mg | 100mg |
| Forms | tablet | sublingual tablet |
What's the same
Lasix and Viagra Professional are used in very different patients, and the points in common are limited. The main shared element is that both meet regulatory standards for efficacy and safety and benefit from pharmacist oversight.
Key differences
Lasix belongs to Diuretics while Viagra Professional belongs to Erectile Dysfunction (ED). Indications, mechanisms and target populations differ. The comparison is most useful when a clinician has mentioned both medications and the patient wants to understand where each fits.
Mechanism and action
Lasix: Lasix acts in the kidney's loop of Henle, where it blocks the NKCC2 co-transporter that normally reabsorbs sodium, chloride and potassium from the urine back into the bloodstream. Viagra Professional: Sildenafil citrate inhibits PDE5, allowing the cyclic GMP produced during sexual arousal to accumulate in penile tissue, which relaxes the smooth muscle of the penile arteries and increases blood inflow.
When Lasix is preferred
Lasix is approved for fluid overload due to heart failure, chronic kidney disease and liver cirrhosis (with or without ascites), as well as acute pulmonary oedema.
When Viagra Professional is preferred
Viagra Professional is intended for adult men with erectile dysfunction.
Frequently asked questions
Is Lasix or Viagra Professional better? ▾
Lasix and Viagra Professional are not interchangeable — they treat different conditions. Asking which is "better" is meaningful only when a clinician has weighed both for the same specific clinical scenario.
Can I switch from Lasix to Viagra Professional? ▾
Switching between Lasix and Viagra Professional is rarely an appropriate decision since they belong to different classes and treat different conditions. The real question is usually whether the diagnosis calls for one medication or the other — which the prescriber resolves.
Do Lasix and Viagra Professional have the same side effects? ▾
No — they belong to different classes and have distinct side-effect profiles. Each medication has its own prescribing information.
More Lasix comparisons
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.