Penegra 50 mg is a sildenafil‑based medicine, and all Penegra‑brand 50 mg tablets have essentially the same duration of effect, regardless of pack size or seller. The active ingredient is 50 mg sildenafil citrate in every strip, so the “longest‑lasting” part depends on how your body responds, not on a different Penegra 50 product.

How long the effect lasts

For most men, Penegra 50 mg starts working within 30–60 minutes and its effect typically lasts about 4–6 hours, during which sexual activity is easier with stimulation. Individual factors—such as age, liver or kidney function, food intake, and other medicines—can slightly shorten or extend this window, but the basic 50 mg strength itself does not last inherently longer in one Penegra‑50 pack versus another.

Practical takeaway

If you are looking for a longer‑lasting erectile‑function medicine, you would need to consider a different drug altogether (for example, a tadalafil‑based product such as Tadalis‑20 or Tadfil‑20, which can last up to 24–36 hours), rather than a different Penegra 50 mg product. For any change in product or dose, always consult a doctor to match duration with your heart health, blood‑pressure status, and other medicines.