Even at 60, I can take the stairs 3 at a time [I learned this from my brother]. But, after taking the meds, I had big trouble moving my legs. It was so bad that I had to use my arms to move my legs late at night.
I called my doctor at Cedars-Sinai who told me to stop taking them immediately. I did. At 61, I can still take the stairs 3 at a time. :=)
Although not as robustly as 20 years ago.