Solanine poisoning

At age 84 I have been off nightshade for 40 years and find the only way to avoid the pain it produces is not to eat it. I have not eaten a potato in the 40 years but from time to time have tried a poblano pepper (incredibly good)
and eggplant to find I really must not eat them at all. I occasionally eat tomatoes and find cooked tomatoes don't seem to offend. Many people with various arthritic diseases that I know have found that avoiding solanine solves the problem for them.