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Viagra Eligibility Criteria and Medical Assessment
Who Can Safely Take Viagra or Sildenafil
Viagra and sildenafil are prescription-only medicines in the UK, available to adult men over 18 who have been diagnosed with erectile dysfunction. The primary candidates are those experiencing difficulty achieving or maintaining erections sufficient for sexual activity. At EverydayMeds, patients can choose between branded Viagra or the more cost-effective generic sildenafil, both containing the same active ingredient.
To determine suitability, patients must complete a comprehensive clinical assessment with a UK-licensed prescriber. This evaluation examines cardiovascular health, current medications, medical history, and lifestyle factors. The assessment ensures the medication can be taken safely and is likely to be effective for the individual's specific circumstances.
Medical Conditions and Viagra Safety
Men with stable cardiovascular health can typically take Viagra safely, though those with certain heart conditions require careful evaluation. The medication may be suitable for men with well-controlled high blood pressure, diabetes, or mild heart disease, provided their condition is stable and they're not taking contraindicated medications.
However, men with severe heart disease, recent heart attacks or strokes (within six months), severe liver impairment, or very low blood pressure should not take Viagra. Those with hereditary degenerative retinal disorders or known allergies to sildenafil are also unsuitable candidates.
Understanding How Long Before Viagra Works
For eligible patients, understanding timing is important for effective use. Viagra typically begins working within 30-60 minutes of taking the tablet on an empty stomach. The medication can take longer to work if taken with food, particularly fatty meals, which may delay absorption.
The effects can last 4-6 hours, though this doesn't mean an erection persists for this duration. Sexual stimulation is still required as the medication doesn't cause automatic erections. Most men find the optimal timing is taking their dose approximately one hour before planned sexual activity.
Critical Drug Interactions and Contraindications
Certain medications create dangerous interactions with Viagra and sildenafil. Men taking nitrate medications such as GTN spray or isosorbide tablets must never take Viagra, as the combination can cause a dangerous drop in blood pressure. Similarly, those taking riociguat for pulmonary hypertension cannot safely use sildenafil.
Other medications requiring careful consideration include alpha-blockers for prostate problems, some antibiotics, antifungal medications, and HIV treatments. Men taking these medications aren't necessarily ineligible but require specialist assessment and potentially dose adjustments.
Age Considerations and Lifestyle Factors
While there's no upper age limit for Viagra use, older men may require lower starting doses due to slower medication clearance and increased sensitivity to side effects. Men over 65 often begin with 25mg rather than the standard 50mg dose.
Lifestyle factors also influence suitability. Heavy alcohol consumption can reduce effectiveness and increase side effect risk. Men who smoke may experience reduced effectiveness due to impaired blood circulation. These factors don't necessarily prevent Viagra use but may affect treatment success and required dosing.
Getting Started with ED Treatment
Eligible men can access Viagra or sildenafil through EverydayMeds' online consultation service. The process involves completing a detailed medical questionnaire reviewed by UK-registered prescribers. This ensures treatment safety and appropriateness before dispensing medication.
The consultation covers medical history, current medications, symptoms, and treatment goals. Approved patients receive clear dosing instructions and guidance on optimal timing for their chosen medication, whether branded Viagra or generic sildenafil.
