In a study by Segal et al. (11), 4 out of 5 healthy individuals were able to achieve tumescence beyond 60% maximum rigidity when subjected to PVS using the Viberect® alone, with no other external visual sexual stimulation. In a randomized controlled study by Fode et al. (12) involving 68 men who underwent nerve-sparing radical prostatectomy, 30 men who received PVS to the frenulum daily for 6 weeks, using the Ferticare® vibrator, showed a trend towards better erections. After 1 year, 53% in the PVS group had an IIEF score ≥18 compared with 32% in the control group, although no statistical achievement was achieved. The role of PVS in penile rehabilitation is based on the postulation that PVS provides early activation of the parasympathetic erectile spinal centres at S2–S4 level, which result in early recovery of the neuropraxic cavernosal nerves.
When considering vitamin supplementation for erectile dysfunction, one of the first vitamins that you may come across in literature would be Vitamin D. This is a vitamin that can be easily obtained through many types of dairy products like milk, cheese, and yogurt and is also in abundance if you live in a tropical climate. Sunlight is able to give us a natural dose of vitamin D daily.  Although vitamin D is usually associated with improving bone strength and prevention osteoporosis, another valuable feat of vitamin D is the fact that it helps reduce atherosclerosis. Studies confirm that there is a similar underlying mechanism that occurs between conditions like cardiovascular disease and erectile dysfunction. As blood vessels are damaged and filled with plaques, the diameter for blood to flow through is gradually reduced. After a few years, the amount of blood may be reduced substantially. Vitamin D is able to help activate cells that remove some of these dangerous plaques and delay the onset of ED. 
While these side effects mainly create discomfort, some individuals are at risk for more serious, even life-threatening reactions to these drugs. Some men have reported fainting after taking impotence medications, and priapism (a painful condition involving an erection that does not subside after more than four hours) has also occurred as an effect of impotence drugs. This condition can lead to permanent nerve damage; injectable drugs may also cause irreversible damage to the penis if used incorrectly.
The phrase “use it before you lose it” can be applied when it comes to helping men with ED regain normal erectile function. Pelvic exercises, more commonly known as kegel exercises, are used to promote urinary continence and sexual health. They help to strengthen the bulbocavernosus muscle, which does three things: allows the penis to engorge with blood during erection, it pumps during ejaculation, and it helps empty the urethra after urination, according to Healthline.
The B vitamin folic acid is good for cardiovascular health. Keeping your blood flowing smoothly is a key to preventing and even treating erectile dysfunction (ED). After all, ED is often an early warning sign of heart problems. In particular, some men have high levels of homocysteine, which can contribute to heart problems. Findings show that eating foods high in folate and taking folic acid supplements may help lower high homocysteine levels. Lots of foods contain folic acid, including spinach, tomatoes, and orange juice. But most of us don’t get enough of these heart healthy foods in our daily diet. To boost folic acid, look for a supplement with about 525 milligrams (mg) of this vitamin. That’s good advice for everyone, and might help with your ED. Research suggests that for some men with ED and high homocysteine levels, taking folic acid may be a key to helping ED medications like Viagra perform well.
Overall, men with a higher total intake of fruit saw a 14 percent reduced risk of ED, whereas men who consumed foods rich in anthocynanin, flavones, and flavanones, had a 10 percent reduced risk of ED. What’s more, consumping several servings of these foods each week is as beneficial for your manhood as briskly walking for five hours each week. But, if you really want to reap the benefits, men who exercised and consumed flavanoid-rich foods experienced a whopping 21 percent reduced risk of erectile dysfunction.
In fact, one common reason many younger men visit their doctor is to get erectile dysfunction medication. Often, men with erectile dysfunction suffer with diabetes or heart disease, or may be sedentary or obese, but they don’t realize the impact of these health conditions on sexual function. Along with erectile dysfunction treatment, the doctor may recommend managing the illness, being more physically active, or losing weight.