I've tried two different brands of cbd oil (without thc) which i bought Online in hope it would ease my backpain But none of them works for this, though it gives me some mental relief i believe. Now to my question is it possible to make a cbd oil and ad a small amount of thc into it. From what i have heard it's the combination of thc and cbd which gives it the medical function. I wish i could make a oil which doesn't give me a head high, Only painrelief. But i don't know where to start. Thankful for any advice.