how long is cialis in bloodstream
Staxyn dissolves in your mouth. It contains the same active ingredient as Levitra and can begin working in about 15 minutes. Viagra takes around 30 minutes to become effective and lasts about 4 hours. Cialis lasts much longer -- up to 36 hours in some cases. Stendra can start doing its thing in as little as 15 minutes, and its effects last up to 6 hours.