Sildenafil citrate in Malegra Professional works by inhibiting the enzyme PDE5, promoting the relaxation of blood vessels and smooth muscles in the penile area. This relaxation increases blood flow to the penis, helping men achieve and sustain erections during sexual stimulation. Before using Malegra Professional or any medication containing sildenafil citrate, consult a doctor. They will assess your medical history, current health condition, and potential interactions with other medications you might be taking.