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).
No, flexeril is a muscle relaxant. The drug name is cyclobenzaprine. Ibuprofen is a non-steroidal anti-inflammatory pain medicine. You can safely take a pain reliever and a muscle relaxant together. They work together to help reduce your discomfort.