Singulair vs Cialis: side-by-side comparison
Singulair (Respiratory Medications) and Cialis (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 | Singulair | Cialis |
|---|---|---|
| Active ingredient | Montelukast | Tadalafil |
| Manufacturer | Organon | Eli Lilly |
| Class | Respiratory Medications | Erectile Dysfunction (ED) |
| Strengths | 4mg, 5mg, 10mg | 2.5mg, 5mg, 10mg, 20mg |
| Forms | tablet, chewable tablet, oral granules | tablet |
What's the same
Singulair and Cialis 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
Singulair belongs to Respiratory Medications while Cialis 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
Singulair: Montelukast selectively blocks the CysLT1 receptor, which mediates the action of leukotrienes C4, D4 and E4 — proinflammatory mediators released by mast cells and eosinophils. Cialis: During sexual stimulation, nitric oxide is released in the corpus cavernosum and activates an enzyme that produces cyclic GMP.
When Singulair is preferred
Singulair is approved in adults and children for the maintenance treatment of asthma, including exercise-induced bronchospasm, and for the treatment of seasonal and perennial allergic rhinitis when conventional therapy is insufficient or not tolerated.
When Cialis is preferred
Cialis is indicated in adult men for the treatment of erectile dysfunction.
Frequently asked questions
Is Singulair or Cialis better? ▾
Singulair and Cialis 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 Singulair to Cialis? ▾
Switching between Singulair and Cialis 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 Singulair and Cialis 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 Singulair comparisons
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.