Filitra 20 mg contains vardenafil 20 mg, a PDE-5 inhibitor used for erectile dysfunction. F filitra.com +1 Whether it is “worth trying” depends on what you're looking for: Effectiveness: Vardenafil is an established ED treatment and can work well for men who don't get satisfactory results from tadalafil (Tadalista/Cialis). 20 mg is the maximum usual single dose; it's generally better not to start at the maximum dose without medical advice. D DailyMed Blood pressure: Like tadalafil, vardenafil can lower BP. The effect can become significant with nitrates or alpha-blockers. Nitrates are contraindicated. D DailyMed Vardenafil also has a QT-prolongation warning, so it should be avoided in people with congenital long-QT syndrome or those taking certain class IA/III antiarrhythmics. D DailyMed Don't combine Filitra with Tadalista/tadalafil, sildenafil (Viagra), or another ED medicine. If you're considering Filitra because Tadalista 5/20 mg isn't working well, tell me what happens with tadalafil (e.g., no erection, erection not hard enough, loses erection, or side effects). I can compare tadalafil vs vardenafil and suggest what generally makes more sense.