Tadalista is marketed as a tadalafil product, and the appropriate strength depends on whether tadalafil is being used as needed or every day, as well as individual response and tolerability. For as-needed treatment of erectile dysfunction (ED), U.S. tadalafil prescribing information recommends 10 mg as the usual starting dose. A healthcare professional may adjust this to 5 mg or 20 mg depending on effectiveness and side effects. It should not be taken more than once in 24 hours. Tadalafil may improve erectile function for up to 36 hours, although sexual stimulation is still required.