Tadalista 20 contains the active ingredient tadalafil citrate, which is taken orally as needed before planned sex to restore the capacity to produce erectile firmness in response to sexual stimulation that has been lost or compromised. Tadalista is a generic version of tadalafil, the weekend tablet that is widely known under the trade name Cialis. The drug's name comes from a unique dynamic feature known as the supreme efficacy window, which lasts for 36 hours from the commencement of impact. Tadalista contains the active ingredient tadalafil, which belongs to the phosphodiesterase type 5 inhibitor class of medicines. It considerably increases sexual function by assisting in the relaxation of the muscles.