frameshift mutation / frame-shift mutation; frameshift. A frameshift mutation is a genetic mutation caused by a deletion or insertion in a DNA sequence that shifts the way the sequence is read. A DNA sequence is a chain of many smaller molecules called nucleotides.
As for Flexeril (cyclobenzaprine) is is not a controlled substance under US, Canadian, or international law. Some drugs used as muscle relaxants ARE controlled substances like Valium and many US states and countries have listed Soma (carisoprodol) as a controlled substance (or prohibited it).
Licit Uses: Cyclobenzaprine hydrochloride is approved for use in the United States as a muscle relaxant. It is marketed under the brand names Flexeril Â® and Amrix Â® and also as generic formulations in 5, 7.5, and 10 mg tablets intended for short-term (2 to 3 week) oral administration.icit Uses: Cyclobenzaprine hydrochloride is approved for use in the United States as a muscle relaxant. It is marketed under the brand names Flexeril Â® and Amrix Â® and also as generic formulations in 5, 7.5, and 10 mg tablets intended for short-term (2 to 3 week) oral administration.