Filitra 10 and Viagra are different medicines, but they work in a similar way. Filitra 10: typically contains vardenafil 10 mg. Viagra: contains sildenafil, commonly available in 25, 50, and 100 mg strengths. Both are PDE5 inhibitors used for erectile dysfunction and require sexual stimulation to work. Vardenafil and sildenafil aren't equivalent milligram-for-milligram, so 10 mg vardenafil shouldn't be compared directly with Filitra 10  sildenafil. Their effects and side effects are broadly similar, although individuals can respond differently. Both can cause headache, flushing, indigestion, nasal congestion, and dizziness. Do not combine Filitra/vardenafil with Viagra/sildenafil or with nitrate medicines, because combining PDE5 inhibitors can increase the risk of dangerously low blood pressure. If you're deciding between Filitra 10 vs Viagra 50, I can explain the practical differences in onset, duration, food/alcohol effects, and side effects.