You should usually take Viagra no more than once in any 24‑hour period , and only at the dose your doctor prescribed (often 25–100 mg as needed before sex).

Quick Scoop

  • Standard advice:
    • Take Viagra (sildenafil) once a day at most , usually 30–60 minutes before sex.
* Typical starting dose is **50 mg** , which can be adjusted down to 25 mg or up to 100 mg by a doctor.

* The effect generally lasts **around 4–6 hours**.
  • Is daily use allowed?
    • It can be taken every day if your doctor says it’s safe for you, based on your heart health, other meds, and side‑effects.
* Some people use sildenafil frequently, but it is still **once per 24 hours** and under a maximum total of **100 mg per day**.
  • What you should not do:
    • Do not take more than one dose in 24 hours , even if the first one “did nothing.”
* Do **not** take **two Viagra pills at once** to “boost” the effect; this raises the risk of low blood pressure, chest pain, and dangerous prolonged erection (priapism).
  • When to call a doctor/ER urgently:
    • Erection lasting 4 hours or more (possible priapism).
* Chest pain, shortness of breath, sudden vision or hearing changes, or feeling faint.
  • If you often “need it more than once a day”:
    • That’s usually a sign to talk with a clinician about:
      • Adjusting your dose.
      • Switching to a daily low‑dose tadalafil (Cialis) or other ED options.

Simple rule of thumb

One prescription dose, once per day, max 100 mg in 24 hours — and only as your doctor has cleared for your heart and medications.

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