Cialis Together works by relaxing the blood vessels in your penis so that they widen. This increases blood flow when you’re sexually aroused and leads to a firmer and longer-lasting erection when you need one. Cialis Together begins to work within 30 minutes and its effects can last up to 36 hours. This gives you a significant window of time when you should be able to get a firm erection when you need one, allowing you to enjoy more spontaneous sex. Just remember, you still need to be sexually aroused to get an erection. Cialis Together contains tadalafil, which has a long-lasting effect. This allows for more spontaneity and less planning around sexual activity.