Tadalafil in Cialis 20 mg tablet acts by relaxing the blood vessels and improving the flow of blood into the male genital organ for sexual arousal and as a result, this helps in maintaining the erection Liver caution Dose adjustment may be needed. Therefore you are advised to drive and operate machinery only if you are alert. Other General Warnings Talk to your doctor if You are a known patient with heart problems. Cialis 20 mg tablet is not recommended to use in women.Cialis Now Available as Generic Tadalafil: Here’s What You Need to Know – GoodRx We have good news for you: generic Cialis, used to treat erectile dysfunction .  · Cialis 20 mg Tablet is a medicine used for the treatment of erectile dysfunction (a condition that occurs when a man has difficulty in getting and/or keeping .