Norvasc vs Singulair: side-by-side comparison
Norvasc (Cardiovascular Medications) and Singulair (Respiratory Medications) belong to different therapeutic classes and are rarely interchangeable. This page compares the medications' purposes, mechanisms and the situations where each is used.
| Property | Norvasc | Singulair |
|---|---|---|
| Active ingredient | Amlodipine | Montelukast |
| Manufacturer | Pfizer | Organon |
| Class | Cardiovascular Medications | Respiratory Medications |
| Strengths | 2.5mg, 5mg, 10mg | 4mg, 5mg, 10mg |
| Forms | tablet | tablet, chewable tablet, oral granules |
What's the same
Norvasc and Singulair 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
Norvasc belongs to Cardiovascular Medications while Singulair belongs to Respiratory Medications. 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
Norvasc: Amlodipine selectively blocks L-type calcium channels in vascular smooth muscle, reducing transmembrane calcium influx and producing peripheral arterial vasodilation. 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.
When Norvasc is preferred
Norvasc is approved in adults for the treatment of essential hypertension and chronic stable angina, and for vasospastic (Prinzmetal's) angina.
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.
Frequently asked questions
Is Norvasc or Singulair better? ▾
Norvasc and Singulair 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 Norvasc to Singulair? ▾
Switching between Norvasc and Singulair 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 Norvasc and Singulair 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 Norvasc comparisons
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.