The use of multiple medications is associated with increased severity of erectile dysfunction, according to a Kaiser Permanente study published online in the British Journal of Urology International.

This study surveyed 37,712 ethnically diverse men from Southern California and found that men taking various medications are likely to have more severe ED. This was part of the California Men's Health Study, a multiethnic cohort of men ages 46 to 69 who are members of Kaiser Permanente in California.

More than two-thirds of men who contacted an email advice service run by a leading sexual advice charity had erection problems, which were frequently linked to loss of sex drive, according to research in the October issue of IJCP, the International Journal of Clinical Practice.

The study by UK researchers also found that a large number of men from the Middle East and Indian subcontinent sought email advice on problems with premature ejaculation and masturbation. Previous research has suggested that these issues are often related to arranged marriages.