I've been toking pretty constantly for over 20 years.
I use for depression, so I toke every day, at least 2 or 3 times, except when I can't get any.

I've acted in over 50 plays, and have no problem memorizing and remembering my lines while stoned.

But I didn't start regular use until I was out of high school, rarely drink alcohol since my 20s, don't take any pills except vitamins and the occasional aspirin or advil, only snorted coke a handful of times (never bought any), and very occasionally trip. I am a regular cig smoker and coffee drinker, however.