Cialis works by enhancing the effects of one of the chemicals the body normally releases into the penis during sexual arousal. The contents herein are for informational purposes only. A deep dive into the ins and outs of purchasing this popular medication online, ensuring that you make informed decisions every step of the way. Visit Store What does cialis do? Liver function: Liver disease or reduced liver function may cause Cialis Tadalafil to build up in the body, causing side effects.We would like to show you a description here but the site won’t allow test1.ru more. Cialis typically takes around 30 minutes to start working, peaks around two hours after taking the recommended dose, and can last up to 36 hours. However, individual results may vary. To buy Cialis online, you’ll need to speak with a healthcare provider first since you cannot get Cialis without a prescription from a doctor. Cialis Dosage. For the treatment of erectile dysfunction: On-demand dosing: The usual recommended dose is 20 mg taken as needed, at least 30 minutes before sexual activity. Cialis (Tadalafil) has been shown to be effective within 30 minutes of taking the tablet, and last up to 36 hours later.