Viagra Eligibility Criteria and Medical Requirements
Who Can Take Viagra?
Viagra is licensed for adult men aged 18 and over who experience erectile dysfunction. The medication requires a prescription following consultation with a UK-licensed prescriber who will assess your medical history, current medications, and cardiovascular health. Most men with ED can safely take Viagra, but a clinical assessment ensures the treatment is appropriate for your individual circumstances.
Medical Conditions That May Affect Eligibility
Certain health conditions require careful consideration before prescribing Viagra. Men with mild to moderate cardiovascular disease can often use Viagra safely, but those with severe heart conditions, recent heart attack or stroke (within 6 months), or very low blood pressure should avoid this medication. Liver impairment may require dose adjustments, whilst severe liver disease is a contraindication.
Men with anatomical penile deformities, blood disorders affecting clotting, or hereditary eye conditions like retinitis pigmentosa need specialist medical advice before taking Viagra. These conditions don't automatically prevent use but require careful monitoring.
Dangerous Drug Interactions
The most serious contraindication for Viagra involves nitrate medications, including GTN spray, isosorbide tablets, or any nitrate-containing drugs used for chest pain. Combining Viagra with nitrates can cause dangerous drops in blood pressure. Similarly, riociguat (used for pulmonary hypertension) should never be taken with Viagra.
Alpha-blockers for enlarged prostate, some blood pressure medications, and certain antifungal drugs can interact with Viagra, potentially requiring dose adjustments or alternative treatments. Always inform your prescriber about all medications, including over-the-counter drugs and herbal supplements.
Common Side Effects of Viagra
Most men tolerate Viagra well, with side effects typically mild and temporary. Common reactions include headaches (affecting up to 16% of users), facial flushing, indigestion, and nasal congestion. These effects usually resolve within a few hours as the medication leaves your system.
Visual disturbances, including temporary blue-tinged vision or increased light sensitivity, affect a small percentage of users. Muscle aches and back pain may occur, particularly with higher doses. These side effects often diminish with continued use as your body adjusts to the medication.
Serious Side Effects Requiring Medical Attention
Whilst rare, some side effects require immediate medical attention. Priapism (erection lasting over 4 hours) is a medical emergency that can cause permanent damage if untreated. Sudden vision or hearing loss, though extremely uncommon, warrants immediate medical assessment.
Chest pain, irregular heartbeat, or severe dizziness during sexual activity may indicate cardiovascular complications and requires urgent medical evaluation. These symptoms are more likely in men with underlying heart conditions.
Viagra vs Generic Sildenafil: Your Treatment Options
EverydayMeds offers both branded Viagra and generic sildenafil, allowing patients to choose based on preference and budget. Both contain identical active ingredients (sildenafil citrate) and provide equivalent effectiveness. Generic sildenafil offers the same therapeutic benefits at a lower cost, whilst some patients prefer the branded option.
The choice between Viagra and sildenafil doesn't affect eligibility criteria or side effect profiles. Both require the same medical assessment and carry identical contraindications. Your prescriber will discuss which option best suits your needs during consultation.
Starting Treatment Safely
Treatment typically begins with a 50mg dose, taken 30-60 minutes before sexual activity. Based on effectiveness and tolerability, doses may be adjusted to 25mg or increased to 100mg. Never exceed one dose within 24 hours, and avoid fatty meals which can delay effectiveness.
