From my own personal experience, I learned that 40 mg of Valium is still considered a therapeutic dose, although it is fairly high. Anything above 40 mg is considered above therapeutic. My doctor gave me a 40 mg cap because, at the age of 60, he felt that I could fall and hurt myself if I increased my dose beyond 40 mg, even though I was only semi-stable at that dose. I believe there are differing opinions concerning what constitutes a high dose of Valium. Roche recommends only 20 mg per day, but what do the pharmaceutical companies know? My feeling is that someone who, for example, had to switch from 4 mg of Klonopin or Xanax to 80 mg of Valium is probably taking a high dose. I'm not a medical doctor, certainly, so I don't have any definitive answers, just opinions. I suspect 20 mg of Valium might be a medium dose and 10 mg a fairly low dose. Just my humble opinion.