Vardenafil is a combination medication used to treat premature ejaculation. Vilitra 60, an inhibitor of phosphodiesterase type 5, works by increasing blood flow to the penis, which results in an erection following sexual stimulation. A selective serotonin reuptake inhibitor (SSRI), dapoxetine increases control over serotonin levels in nerves and lengthens the time it takes to ejaculate.