Medical Conditions That Require Doctor Assessment
Cardiovascular Health Assessment
Your doctor must assess your cardiovascular fitness before prescribing Viagra or sildenafil. This includes evaluating recent heart attacks, strokes, unstable angina, or severe heart failure within the past six months. Men with these conditions may need specialist cardiology clearance before ED treatment can be safely prescribed. Blood pressure measurements are crucial, as both very high and very low blood pressure can affect treatment suitability.
Dangerous Drug Interactions
The most serious safety concern involves nitrate medications commonly prescribed for chest pain (angina). These include GTN sprays, isosorbide mononitrate tablets, and glyceryl trinitrate patches. Combining Viagra or sildenafil with nitrates can cause life-threatening blood pressure drops requiring emergency medical attention. Always inform your prescriber about all medications, including those prescribed by different doctors or obtained privately.
When Professional Consultation Is Essential
Seek immediate medical advice if you experience chest pain, dizziness, or nausea during sexual activity whilst taking Viagra or sildenafil. Priapism (erection lasting over four hours) requires emergency treatment to prevent permanent damage. Men with Peyronie's disease, bleeding disorders, or active peptic ulcers need specialist evaluation before treatment commencement.
Liver and Kidney Function Considerations
Impaired liver or kidney function affects how your body processes sildenafil, potentially requiring dose adjustments or alternative treatments. Your doctor may recommend blood tests to assess organ function before prescribing. Severe liver disease typically contraindicates Viagra use, whilst mild impairment may require starting with lower doses and careful monitoring.
Age-Related Safety Considerations
Older men often have multiple health conditions and take several medications, increasing interaction risks. Age alone doesn't prevent Viagra use, but comprehensive medical review becomes more important. Your prescriber will consider your overall health status, medication list, and treatment goals when determining the safest approach to ED management.
