Stendra vs Avanafil: are they the same?
Stendra is a commercial brand whose active ingredient is exactly Avanafil. 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 — Stendra contains Avanafil as its active ingredient. Talking about "Stendra" in clinical terms is the same as talking about Avanafil at the dose strengths 50mg, 100mg, 200mg. The differences from the authorised generic are brand, manufacturer (Metuchen Pharmaceuticals), excipients, tablet appearance and price — not the active molecule itself.
When Stendra is used
ステンドラは成人男性の勃起不全に対して承認されています。シルデナフィルおよびタダラフィルとは異なり、肺動脈性高血圧症、前立腺症状または毎日服用の適応については検討されていません。現行の勃起不全ガイドラインによれば、4種類のPDE5阻害薬はすべて第一選択の経口治療薬であり、その選択は患者の好み、作用発現/持続プロファイル、副作用プロファイルおよび費用に基づきます。
Mechanisms compared
Because they share the same active ingredient, the mechanism is identical: アバナフィルは陰茎海綿体内のホスホジエステラーゼ5型(PDE5)を選択的に阻害し、cGMPを増加させ、性的刺激に応答した一酸化窒素介在性血管拡張を増強します。シルデナフィルやバルデナフィルと比較した他のホスホジエステラーゼアイソフォームに対するPDE5への高い選択性が、やや異なる副作用プロファイルの薬理学的根拠とされています。作用発現は他のPDE5阻害薬よりも速く、6-17時間の半減期は頓用投与に適しています。
Brand or generic — which to choose?
For most patients, authorised generics of Avanafil are clinically equivalent substitutes for Stendra 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 Stendra the same as Avanafil? ▾
Clinically yes — Stendra is the brand and Avanafil is its active ingredient. At equivalent doses (50mg, 100mg, 200mg) they produce the same effect. The difference is brand, manufacturer (Metuchen Pharmaceuticals) and price.
Is generic Avanafil as effective as Stendra? ▾
Yes. Authorised generics of Avanafil must demonstrate bioequivalence to the brand. The active substance is the same; average effect is the same. Price is usually substantially lower.
Why does Stendra cost more than generic Avanafil? ▾
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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