Y55: Agents primarily acting on smooth and skeletal muscles and the respiratory system

Y55.2: Other and unspecified agents primarily acting on muscles

The condition represented by ICD-10 Y55.2 is related to adverse effects from agents primarily acting on muscles, excluding anesthetics (anaesthetics). These agents could be a variety of substances or drugs designed to specifically aid muscle function, manage muscle spasms, or control muscular pain. They might also be used in the treatment of muscular diseases or conditions. Negative reactions or side effects can occur, leading to this medical code's use. These side effects may range from mild symptoms such as muscle weakness, fatigue, or discomfort to more severe symptoms such as muscle breakdown (rhabdomyolysis), serious allergic reactions, or severe pain. The manifestations depend on the specific agent involved and the individual's physical response. This condition does not denote a specific disease, but rather the body's adverse reaction to a certain muscle-acting agent.