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

Y55.7: Other and unspecified agents primarily acting on the respiratory system

The ICD-10 code Y55.7 refers to unwanted, harmful effects that occur while taking certain drugs or substances primarily acting on the respiratory system. These substances can be prescribed medications or over-the-counter treatments intended to alleviate symptoms or treat conditions related to the respiratory system. The adverse effects can vary widely depending on the substance and the individual, but may include symptoms such as difficulty breathing, cough, wheezing, chest pain, or changes in voice. These occur as unintended side effects rather than a typical response to medication. The severity can also range from minor discomfort to severe medical emergencies. It is important to note that while these adverse effects are generated by agents acting on the respiratory system meant to help, they end up causing complications instead.