An inflatable penile implant is a device implanted inside the penis to give an erection to the male with erectile dysfunction. The implants are the last option for males with severe erectile dysfunction cases.  Doctors believe that Sildenafil Citrate 200 mg, a higher dose, is effective in more than 92 % of erectile dysfunction cases among men. The higher dose is only recommended when lower doses fail to give satisfactory result to the male.