I have been taking Lisinopril HCTZ for two weeks and experienced ...

I have been taking Lisinopril HCTZ for two weeks and experienced no side effects except one which concerns me. At this point I am not sure if it was caused by Lisinopril and would like to hear if others had something similar. I am 72 and in good condition and several weeks ago went up a mountain near Boulder. I managed quite well. At that point I had not taken any medication for two weeks having run out of Benicar HCT. A few days after starting Lisinpril I went up a mountain again and this time I was dragging my heels and my wife had to frequently wait for me. If this happens again I will dump Lisinopril and try to manage without b/p pills. If I can't I will return to Benicar but I deeply re resent the Benicar company's price gouging because they have Benicar on patent. Benicar costs 40 times more per pill than Lisinopril.