I can understand your concern about taking any medication for prolonged periods of time. Research does indicate that some medications can cause cognitive dulling or slight memory problems. What everyone has to consider, who is taking any medication, is whether the cost-benefit analysis favors taking the medication versus not taking it. In other words, if you were not to take it what would your quality of life be like?
Although some research reports, which appear frequently in TV news programs, play up problems in certain medications, you must still remember that one research report does not indicate that it is 100% totally correct in everyone's case. Like everything else, research must be taken with a grain of salt and one of those grains has to do with who funded the research and where it was done and on whom. Much of the research is done with mice and, although it may be a convenient model, is it necessarily totally applicable to human beings?
I am not an M.D. and I cannot provide you with any information regarding marijuana for the use of anxiety, although I do know that persons with multiple sclerosis find it useful in pain management. Some people, probably, do use it for anxiety and in some states, where it is legal, it is formulated in edible forms. Therefore, it isn't necessary to smoke it.
Of course, you know that lifestyle changes can play a great role in anxiety management as can simple, regular exercise and hobbies, outings with family and friends and some meaningful activity that gives you joy. So, I would first suggest that you do an evaluation of your life and look to see if something might be missing and you might be able to help yourself with your anxiety.
I would also suggest that you view our relaxation breathing video in our Tips column and begin to use that technique on a regular basis. Use it as often as you wish.
I hope you find some of this information useful and that your anxiety does decrease.