Vilitra is another medication used to treat erectile dysfunction, and its active ingredient is vardenafil, which is different from sildenafil (Fildena, Cenforce) and tadalafil (Vidalista). Vardenafil works similarly by increasing blood flow to the penis but has its own safety profile. Common Side Effects These are usually mild and temporary: Headache Flushing (redness or warmth in face, neck, or chest) Indigestion or upset stomach Nasal congestion Dizziness Visual disturbances (blurred vision, sensitivity to light, slight color changes) Serious Side Effects (Seek immediate medical attention) Chest pain, irregular Vilitra  , or shortness of breath Severe dizziness or fainting Sudden loss of vision Sudden hearing loss or ringing in ears Priapism (erection lasting more than 4 hours — medical emergency) Precautions Do not use with nitrates (e.g., nitroglycerin) — can cause dangerously low blood pressure. Use caution if you have heart problems, low or high blood pressure, liver or kidney disease. Avoid excessive alcohol, which can worsen dizziness or blood pressure effects. Inform your doctor if you take alpha-blockers for prostate issues, as this may also lower blood pressure. Summary: Vilitra is generally considered safe when used as prescribed. Its onset is usually around 30–60 minutes, and its effects last up to 4–5 hours. Like all ED medications, serious side effects are rare but possible, particularly for individuals with heart disease or those taking nitrates.