Use of larger starting off doses in patients that are not opioid tolerant may possibly cause deadly respiratory despair.If you take tadalafil for pulmonary arterial hypertension, do not take Cialis® or other PDE5 inhibitors, for example sildenafil (Revatio® or Viagra®) or vardenafil (Levitra®). Cialis® also is made up of tadalafil. If you take… Read More