Viagra vs Sildenafil Citrate: are they the same?
Viagra is a commercial brand whose active ingredient is exactly Sildenafil Citrate. 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 — Viagra contains Sildenafil Citrate as its active ingredient. Talking about "Viagra" in clinical terms is the same as talking about Sildenafil Citrate at the dose strengths 25mg, 50mg, 100mg. The differences from the authorised generic are brand, manufacturer (Pfizer), excipients, tablet appearance and price — not the active molecule itself.
When Viagra is used
이 약물은 성인 남성에서 성행위에 충분한 음경 발기를 달성하거나 유지할 수 없는 상태로 정의되는 발기부전의 치료에 적응증이 있습니다. 여성, 소아 환자 또는 발기부전 진단이 없는 남성에게는 적응증이 없습니다. 제조사 처방 정보에 따르면, 임상의가 기저 원인과 심혈관 적합성을 평가한 후에만 치료를 고려해야 합니다.
Mechanisms compared
Because they share the same active ingredient, the mechanism is identical: 성적 자극 시 음경 해면체에서 산화질소가 방출되어 cGMP를 생성하는 효소를 활성화합니다. cGMP는 음경 동맥의 평활근을 이완시켜 혈류 증가와 발기를 가능하게 합니다. 실데나필 시트르산염은 PDE5가 cGMP를 분해하는 것을 막아 그 작용을 연장합니다. 발현은 일반적으로 30~60분 이내이며, 임상시험에 따르면 효과는 최대 4시간까지 지속됩니다.
Brand or generic — which to choose?
For most patients, authorised generics of Sildenafil Citrate are clinically equivalent substitutes for Viagra 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.
자주 묻는 질문
Is Viagra the same as Sildenafil Citrate? ▾
Clinically yes — Viagra is the brand and Sildenafil Citrate is its active ingredient. At equivalent doses (25mg, 50mg, 100mg) they produce the same effect. The difference is brand, manufacturer (Pfizer) and price.
Is generic Sildenafil Citrate as effective as Viagra? ▾
Yes. Authorised generics of Sildenafil Citrate must demonstrate bioequivalence to the brand. The active substance is the same; average effect is the same. Price is usually substantially lower.
Why does Viagra cost more than generic Sildenafil Citrate? ▾
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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