cialis questions

For those more experienced with liquid cialis than I, I hae the following questions...

1.) Could one overuse cialis? To the point of harmful side effects? If so, at what point does this happen, and does this occur when using only occasionally? (maybe once a week)

2.) At what point if any can you develop a tolerance to cialis?

Thanks for the help guys. I ask because i got my cialis about a month ago, used it a few times with good results- just was wondering about these questions...

bump

Not sure about # 2 but I know if I go close to 25mg or higher I get one heck of a headache. I think the manufacturer recommends starting at a low does and working up. Check out their home page.