CIALIS may still be effective up to 36 hours after taking the tablet. Do not take CIALIS more than once a day. CIALIS 10 mg and 20 mg is intended for use prior to anticipated sexual .The table below summarizes the typical dosages for tadalafil: Indications of Tadalafil:. BPH occurs when the prostate and the surrounding tissues become enlarged. Common Cialis 20mg benefits include: You can have sex more than one time per day. Priapism is a serious medical emergency that, if left untreated, can cause damage to the tissue inside your penis. Like other medications, Cialis can cause allergic reactions in a small percentage of people. If you have a private prescription for tadalafil, read the information that comes with your medicine carefully.Cialis is a medication that is taken to help treat erectile dysfunction. It works by increasing blood flow to the penis when a man is sexually aroused to help him get and . Dosage and strength Talafil comes as mg, 5mg, 10mg and 20mg tablets. Dose for erectile dysfunction The usual dose of talafil for erectile dysfunction is 10mg when . Three studies were conducted in men to assess the potential effect on spermatogenesis of CIALIS 10 mg (one 6-month study) and 20 mg (one 6-month and one 9-month study) .Side effects are typically mild. According to clinical trials, a single 20mg dose of Cialis provides an improvement in erections in the majority of men with ED. Brand-name versions of the drug approved for PAH include Adcirca. In clinical trials, 76 percent to 85 percent of men with ED who were given this dosage of Cialis could successfully have penetrative sex with their partner, versus 68 to 77 percent of men who used Cialis at a 10mg dosage. Viagra guide goes into more detail on the main advantages and disadvantages of both medications, from effectiveness to side effects, ease of use, safety and more. Dosing Guidelines Typical Cialis dosages will differ depending on the conditions it’s prescribed to treat as well as other factors.