Sildenafil Teva
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Understanding sildenafil side effects helps you track treatment effectiveness and know what to expect. This comprehensive guide covers common and serious side effects, monitoring your response, and when to consult your GP. EverydayMeds offers both Viagra (branded) and sildenafil (generic) options, allowing you to choose the most suitable treatment during your online consultation with our UK-licensed prescribers.
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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.
Most men experience mild side effects when starting sildenafil treatment. Common side effects include headaches (affecting up to 16% of users), facial flushing, nasal congestion, and indigestion. These typically indicate the medication is working as it affects blood vessels throughout your body, not just in the genital area. Side effects often diminish as your body adjusts to treatment over 2-4 weeks.
Effectiveness should be measured over several attempts, not just one dose. Sildenafil typically works within 30-60 minutes and remains effective for 4-6 hours. Success rates improve with repeated use - studies show 43% success on first attempt, rising to 69% by the fourth attempt. Keep a brief record of timing, effectiveness, and any side effects to discuss with your prescriber during follow-up consultations.
Rare but serious side effects require urgent medical attention. Contact emergency services immediately if you experience chest pain, severe dizziness, fainting, or an erection lasting over 4 hours (priapism). Sudden vision or hearing loss, though extremely rare, also requires immediate medical assessment. These serious side effects occur in less than 1% of users.
Side effects can often be minimised through proper usage. Take sildenafil on a relatively empty stomach for best results, avoid excessive alcohol, and ensure you're sexually aroused for effectiveness. If experiencing troublesome side effects, your prescriber may adjust your dose - sildenafil is available in 25mg, 50mg, and 100mg strengths. Both Viagra (branded) and generic sildenafil contain the same active ingredient, so switching between them won't affect side effect profiles.
Headaches can often be managed with paracetamol (avoid if taking other medications without checking). Stay hydrated and consider taking sildenafil with food if experiencing stomach upset, though this may delay onset. If facial flushing bothers you, it typically subsides within 2-3 hours. Most side effects are dose-related, so speak with your prescriber about adjusting your dose if problems persist beyond the first month of treatment.
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