If you take tadalafil for pulmonary arterial hypertension, will not consider Cialis® or other PDE5 inhibitors, like sildenafil (Revatio® or Viagra®) or vardenafil (Levitra®). Cialis® also consists of tadalafil. If you take excessive tadalafil or consider it together with these medicines, the prospect for Unintended effects will be higher. Shou