Erectile dysfunction increases with use of multiple medications

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

The most common medications associated with ED include antihypertensives (beta blockers, thiazides, and clonidine) and psychogenic medications such as selective serotonin reuptake inhibitors, tricyclic antidepressants, lithium, monoamine oxidase inhibitors, and any medication which can interfere with testosterone pathways.