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Understanding Viagra safety is crucial before starting treatment for erectile dysfunction. This comprehensive checklist covers essential safety information, eligibility requirements, and contraindications for Viagra and its generic alternative, sildenafil. Both options are available through EverydayMeds following a clinical assessment by UK-licensed prescribers. Use this guide to determine if Viagra treatment may be suitable for you and understand the safety considerations involved.
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When PDE5 is suppressed, blood is able to flow more freely through the body—including to the (you guessed it) penis.

More blood flow to the penis means harder, more satisfying erections once you're sexually stimulated.
Before starting Viagra or generic sildenafil, several safety assessments are essential. UK regulations require a clinical consultation with a licensed prescriber to evaluate your cardiovascular health, current medications, and medical history. This assessment helps determine if Viagra treatment is appropriate and safe for your individual circumstances.
The most serious safety concern involves nitrate medications. Never combine Viagra with glyceryl trinitrate (GTN) spray, isosorbide tablets, or any nitrate-based heart medication. This combination can cause a dangerous drop in blood pressure requiring emergency medical attention. Additionally, avoid riociguat and inform your prescriber about all medications, including over-the-counter remedies and herbal supplements.
Certain medical conditions require careful evaluation before Viagra treatment. Severe heart disease, recent heart attack or stroke within six months, very low blood pressure, and severe liver problems may make treatment unsuitable. Men with hereditary eye conditions affecting the retina should discuss alternative treatments with their healthcare provider.
When prescribed Viagra, follow dosing instructions precisely. Take only one tablet within 24 hours, typically 30-60 minutes before sexual activity. The medication works only with sexual stimulation and effects may last 4-6 hours. Fatty meals can delay effectiveness, so consider timing around food intake. Both branded Viagra and generic sildenafil follow identical safety guidelines.
Recognise potential side effects that require immediate medical attention. These include chest pain, severe dizziness, sudden vision or hearing loss, and erections lasting longer than four hours. Common mild side effects like headache, flushing, or nasal congestion typically resolve without intervention but should be monitored.
Regular review of your treatment ensures continued safety and effectiveness. Report any new medications, health changes, or concerning symptoms to your prescriber. EverydayMeds provides ongoing support and medication reviews to maintain treatment safety. Both Viagra and sildenafil options undergo the same rigorous safety monitoring protocols throughout your treatment journey.
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