Filitra, which contains vardenafil (same as Vilitra), can cause nausea as a side effect, though it is not the most common one. Common Side Effects of Filitra Headache Flushing (redness of face/neck) Dizziness Nasal congestion Indigestion Less Common Side Effects Nausea Back pain or muscle aches Vision changes (blurred vision, sensitivity to light) Tips to Reduce Nausea Take on a not completely empty stomach, but avoid heavy or fatty meals. Stay hydrated. Avoid alcohol, which can worsen nausea. Nausea is usually mild and temporary. If it’s severe, persistent, or accompanied by chest pain or fainting, seek medical attention immediately. If you want, I can also explain why PDE5 inhibitors like Filitra can cause nausea—it’s actually related to blood vessel effects.