With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Cyclobenzaprine is sold in America.
text_B: Cyclobenzaprine , sold under the brand name Flexeril among others , is a muscle relaxer medication used to relieve skeletal muscle spasms and associated pain in acute musculoskeletal conditions .. muscle relaxer. muscle relaxer. skeletal muscle. skeletal muscle. acute. Acute ( medicine ). It is the best-studied drug for this application .. It has also been used off-label for fibromyalgia treatment .. off-label. Off-label use. fibromyalgia. fibromyalgia. As of 2015 the cost for a typical course of medication in the United States is less than .
related.