It comes as tablets. You can take it at least 30 minutes before you want to have sex. Cialis Together will not be sold to those with severe cardiovascular disorders; at high cardiovascular risk; severe kidney or severe liver failure; or taking certain interacting medicines. It can be dangerous to take tadalafil if you also take medicines called nitrates often prescribed for chest pain. You can only get it on prescription for erectile dysfunction if you have a specific condition such as multiple sclerosis or a spinal cord injury. Taking tadalafil alone is not enough to cause an erection.Cialis is a prescription-only medicine for men, aged 18 or over, experiencing symptoms of erectile dysfunction. It comes in the form of a tablet which is . Cialis (branded Tadalafil) is an erectile dysfunction treatment that lasts up to 36 hours. Learn more about Cialis with our expert consultation service. Choose delivery to your . There are lots of treatments available for erectile dysfunction. These include well-known medications such as Viagra and it’s generic version sildenafil. Others include Cialis – .