how long will cialis last
How Quickly Cialis Works and How Long It Lasts. Cialis tends to take effect more quickly than other ED drugs, with onset of effectiveness within 30 minutes typically. The recommendation is to take Cialis 30 minutes prior to sexual activity, while with Viagra and Levitra, users are instructed to take the drug 60 minutes before sexual activity. Generally, the effects of Cialis last 24 to 36 hours after taking it.