Today my Grandmother called me and said she wanted me to get her cannabis, but in edible form. She is 78 years old and has been on opiates for over 10 years for arthritis and wants to use cannabis not to get rid of the pain, but to relax. My question is what edible is the most effective and doesn't use to much herb as money is an issue. I know this mainly depends on the strain you are using, which I am planning on using a strong Indica, but does the type of edible effect the performance of the medicine? Thanks ahead of time for all of the suggestions and answers, me and my Grandmother will greatly appreciate it!