If you need viagra now generic viagra online without prescription Besides treating the underlying causes and psychological consequences, the first line treatment of erectile dysfunction consists of a trial of PDE5 inhibitor drugs (Viagra for instance or sildenafil). There are many other treatments that will be discussed on this site. Having trouble maintaining an erection from time to time isn't necessarily a cause for concern. Conclusion Oral sildenafil is an effective and well-tolerated treatment for erectile dysfunction in men with diabetes.