Tadarise  contains Tadalafil which regulates the PDE5 enzyme within the penis which increases blood flow. On the opposite hand, dapoxetine increases serotonin levels within the neurological system, which prolongs ejaculation time and improves ejaculation control.  Tadarise  contains Dapoxetine HCL and Tadalafil. Dapoxetine is an SSRI or selective serotonin reuptake inhibitor. This helps in delaying ejaculation.