Instruct: Classify an Amazon review as either positive or negative.
Query: No More Aching Back!

I had used Momentum for years for occasional back spasms. I was unable to find the product and thought it had been taken off the market. I was thrilled to find that it was still available as Percogesic. I always have it on hand. It works best when taken immediately after a spasm starts, but it will help even if taken later. It is best taken with food, as it is hard on the stomach. I highly recommend this product as well as Amazon's great price and service.