erectile dysfunction
"After using Viagra 50mg successfully for 8 years I gave the everyday 10mg Cialis a try.  During the free 30 day trial it was great.  But since then (I'm paying for it now) the results have been eratic. It's good for a week or two, and then nothing!  Very frustrating (and expensive) to have to take Viagra as well.  I'm going back to Viagra even though it is less convenient."