Singulair vs Montelukast: are they the same?
Singulair is a commercial brand whose active ingredient is exactly Montelukast. This page explains what that means in practice: where they differ (brand, manufacturer, price, available strengths), why they are clinically equivalent, and when the brand or an authorised generic is the better choice.
Are they the same?
Yes — Singulair contains Montelukast as its active ingredient. Talking about "Singulair" in clinical terms is the same as talking about Montelukast at the dose strengths 4mg, 5mg, 10mg. The differences from the authorised generic are brand, manufacturer (Organon), excipients, tablet appearance and price — not the active molecule itself.
When Singulair is used
シングレアは成人および小児における気管支喘息(運動誘発性気管支痙攣を含む)の維持治療、ならびに従来の治療が不十分または忍容性がない場合の季節性および通年性アレルギー性鼻炎の治療に承認されています。現行のガイドラインによれば、モンテルカストは大半の成人において喘息維持治療の第一選択ではなく、吸入ステロイドが優先されますが、追加療法として、または吸入器を正しく使用できない患者に有用です。
Mechanisms compared
Because they share the same active ingredient, the mechanism is identical: モンテルカストはマスト細胞および好酸球から放出される炎症性メディエーターであるロイコトリエンC4、D4、E4の作用を媒介するCysLT1受容体を選択的に遮断します。この受容体を遮断することで、気管支収縮、粘膜浮腫、気道炎症を減少させます。本薬はヒスタミンまたはβ2アドレナリン経路には影響しないため、抗ヒスタミン薬およびβ作動薬と相補的です。
Brand or generic — which to choose?
For most patients, authorised generics of Montelukast are clinically equivalent substitutes for Singulair and typically cost substantially less. The practical differences are manufacturer, excipients (rarely matters except in specific sensitivities), tablet appearance and price. The brand is preferred by some patients for personal reasons or insurance coverage; the generic is the default when cost matters.
よくある質問
Is Singulair the same as Montelukast? ▾
Clinically yes — Singulair is the brand and Montelukast is its active ingredient. At equivalent doses (4mg, 5mg, 10mg) they produce the same effect. The difference is brand, manufacturer (Organon) and price.
Is generic Montelukast as effective as Singulair? ▾
Yes. Authorised generics of Montelukast must demonstrate bioequivalence to the brand. The active substance is the same; average effect is the same. Price is usually substantially lower.
Why does Singulair cost more than generic Montelukast? ▾
The price difference reflects originator development costs, brand recognition and competition among generic manufacturers. The molecule is identical; the cost is not.
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