Folk medicine...do you believe in it and use it?

I assume you're referring to 'traditional medicine'.

Yes, I believe in traditional medicine, and yes, I use it.  (I also use alternative medicine.)

Sometimes I feel better when i use it, sometimes i don't - about the same odds I have with modern medicine (but without all the side effects)

As a general rule, no. Not for serious conditions in any instance. 
I believe there are some home remedies/folk medicine that have value, but to me, it is wiser to defer to modern medicine and the educated pros who render it. 

I do believe in folk medicine and old aboriginal medicines and healing sweat lodges and a doobie a day keeps the doctor away. Years ago figured I was getting arthritis or something so I started drinking lots of Stinging nettle tea everyday for a mouth or so and it seemed to cure me. Cheers and happy first day of Fall!   

Tiger cock and rhino horn hasn't  steered me wrong yet.