The 'as required' Tadalafil (generic Cialis) has an advantage over Sildenafil in that it lasts quite a bit longer - up to 36 hours (in contrast with 4-5 hours for Sildenafil).
A: The 'as required' Tadalafil (generic Cialis) inenzuzo ngaphezu kweSildenafil ngoba ihlala isikhathi eside kakhulu - kuze kufike emahoreni angama-36 (uma kuqhathaniswa namahora angu-4-5 weSildenafil).