Tadalista CT 20 contains tadalafil 20 mg, it generally should not be taken daily for erectile dysfunction unless a doctor has specifically prescribed that regimen. For tadalafil, the standard labeled dosing is: Daily ED treatment: start at 2.5 mg once daily, potentially increasing to 5 mg once daily depending on response and side effects. 20 mg: intended as an as-needed ED dose, not the usual daily dose. It should not be taken more than once in 24 hours. For BPH (enlarged prostate) or ED + BPH, the usual daily dose is 5 mg. So, there isn't a routine situation where 20 mg tadalafil should be taken every day for ED. A doctor might use a different regimen in unusual circumstances, but that should be individualized. Also, tadalafil is contraindicated with nitrate medicines because of potentially dangerous blood-pressure lowering. Given your earlier questions about ED following prostate surgery, 2.5–5 mg daily is the range worth discussing with your urologist, rather than taking Tadalista CT 20 every day.