Lantus vs Viagra Professional: side-by-side comparison
Lantus (Diabetes Treatment) 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 | Lantus | Viagra Professional |
|---|---|---|
| Active ingredient | Insulin Glargine | Sildenafil Citrate |
| Manufacturer | Sanofi | Pfizer |
| Class | Diabetes Treatment | Erectile Dysfunction (ED) |
| Strengths | 100 IU/mL | 100mg |
| Forms | pre-filled pen, vial | sublingual tablet |
What's the same
Lantus 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
Lantus belongs to Diabetes Treatment 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
Lantus: Insulin glargine binds the insulin receptor with similar affinity to human insulin, activating intracellular signalling that increases glucose uptake in muscle and adipose tissue, suppresses hepatic glucose production an… 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 Lantus is preferred
The medication is indicated in adults and paediatric patients with type 1 diabetes mellitus, and in adults with type 2 diabetes mellitus when basal insulin is required.
When Viagra Professional is preferred
Viagra Professional is intended for adult men with erectile dysfunction.
Frequently asked questions
Is Lantus or Viagra Professional better? ▾
Lantus 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 Lantus to Viagra Professional? ▾
Switching between Lantus 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 Lantus 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 Lantus comparisons
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.