"I am 46 years old on blood pressure medicines and have been experiencing erections over the last couple of years that are not very firm and at times not hard at all. I took one Cialis 20MG and within 30 minutes I had an erection that was harder than I have had in years. Cialis lasted for over 36 hours as I was able to achieve a very hard erection many times. My wife was very happy and tired by the end of the weekend.... Amazing science!"