Sildenafil is a medicine used to treat erectile dysfunction such as impotence. Long-term use of sildenafil under medical supervision usually does not lead to permanent loss of erectile function. Sildenafil works by increasing blood flow to the penis, which helps to achieve and maintain an erection. However, if you have concerns about your ability to have an erection or have noticed any changes in this regard after long-term use of sildenafil, I recommend that you consult your doctor. There can be various factors that affect your ability to have an erection, such as hormonal problems, stress, depression, heart disease, diabetes, or nerve damage. Your doctor will be able to carry out an appropriate assessment and suggest the best solution for your situation. I enclose useful material related to the topic: https://www.gdziepolek.pl/kategorie/leki-na-potencje