I used one of the 1:1 CBD/THC patches to help me with my back spasms. I placed my patch directly on the area where my spasm is strongest, (upper left back between shoulder blade and spine) and started to feel relief in about 20 minutes. The initial relief started lightly but progressed quickly. About 45 minutes in to using the patch my spasms were much milder than they were before. I would have small little flare ups of my back spasm throughout the night, but that is typical even when I am using muscle relaxers. On top of the relief I was receiving from the patch for my back, I was feeling relaxed and it even made me tired about two hours after putting the patch on. I personally did not feel much of a psychoactive effect due to my high tolerance to THC, but some users will feel psychoactive effects from this product. I used this product as medicine for my back spasms and it helped for over 6 hours and had the added benefit of helping me fall asleep.