Injections of platelet-rich plasma (PRP) made from your own blood can be used to address a variety of issues, including sexual dysfunction. Blood is drawn from your arm, spun in a specially-designed centrifuge and the resulting platelet-rich plasma is then injected directly into the penis. The goal is to increase blood flow and tissue regeneration, helping overcome the changes of aging. Some men report an increase in quality and duration of erection after several treatments. The P Shot may be recommended in conjunction with other therapies.