Thanx, Achillesx, for your comments/alert. Since no one replied, I'm assuming no one has taken more than 20 mg Cialis. I'll probably try a different brand of Cialis.
The is only one brand of Cialis, called Cialis. There are no legal generics for it yet in the USA, and I wouldn't trust anything made overseas.
20mg is the highest 'regular' dose of Cialis.
20mg was the strength of the pill I got in a sample pack from my doctor. They worked so well (too well) for me that I went to 10mg, then to 5mg. The 20mg made my face flush, stuffy nose, back ache etc., and the hardest, easiest erections I ever had since my teens. The lower doses ensured an erection, but greatly reduced or eliminated the side effects.
I assume you are working with a doctor, so trying a higher dose, or another ED drug may produce better results. ED drugs do not all work the same for everybody, and in some sad cases, do not help some people.