Sildalis 120mg (sildenafil sildalis 120mg) is a PDE 5 inhibitor, making it an ideal drug to treat erectile dysfunction.Sildalis 120mg (sildenafil sildalis 120mg) is a drug used in the treatment of erectile dysfunction. This health problem is considered taboo, and men find it embarrassing to talk about it for fear of being shamed and ridiculed. For the unversed, erectile dysfunction is a sexual problem faced by men, wherein they find it difficult to attain and sustain an erection for the duration of sexual activity. This puts them in a terrible state of mind and, in some cases, hampers the relations between partners.