Medication / Sexual health

Sildenafil (Viagra / Generic)

FDA-approved PDE5 inhibitor used in prescription contexts for erectile dysfunction and pulmonary arterial hypertension. The library profile focuses on identity, timing context, cardiovascular cautions, interaction risks, and official-label verification.

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Educational reference only. This page does not diagnose, prescribe, or replace care from a licensed professional. Laws, availability, and clinical appropriateness vary by location.

Reference dosePrescription label dosing varies by indication, age, kidney/liver function, other medications, and cardiovascular status. Use only as label and clinician-directed context, not casual self-directed dosing.

Half-lifeAbout 4 hours in typical label context; exposure can change with age, liver/kidney status, and CYP3A4 inhibitors. hours

Risk flagmoderate

Regulatory noteReview required

Side effects and watch-outs

Headache
Flushing
Nasal congestion
Dyspepsia
Dizziness
Visual color/brightness changes
Back or muscle aches in some PDE5 contexts