Cialis, which contains the active ingredient tadalafil, is one of the most popular medications for ED. It belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors, the same ...

Have you taken brand name Cialis or Viagra and felt like you had a hangover? That “Viagra hangover” might actually be a headache from Viagra, and it’s a common side effect of this and other ...

Taking the erectile dysfunction drug Cialis while receiving radiation therapy for prostate cancer doesn't seem to help men's sexual function after treatment, a new study finds. About 40 percent of ...