Cialis (generic name: tadalafil) is a prescription medication used to treat erectile dysfunction (ED) and certain symptoms of an enlarged prostate. The typical recommended starting dose for Cialis when used for ED is 10 mg, taken at least 30 minutes before sexual activity. Depending on how well it works and how your body responds to the medication, your healthcare provider may adjust the dose to 20 mg or lower it to 5 mg. It's important to note that Cialis should only be taken as prescribed by a healthcare professional, and you should not exceed the recommended dosage without their guidance. Additionally, Cialis does not provide sexual stimulation on its own; it requires sexual arousal to be effective.