In simple words: This code is used when someone has been harmed by taking too much, too little, or the wrong dose of a type of medication called an alpha-adrenoreceptor agonist, like metaraminol. It also covers negative side effects from these medications, even if the correct dose was taken.

This code encompasses a range of situations related to predominantly alpha-adrenoreceptor agonists, including accidental or intentional poisoning, adverse effects from proper administration, and underdosing due to various reasons.It specifically includes metaraminol as a causative agent.

Example 1: A patient presents to the emergency department with severe hypertension, headache, and chest tightness after accidentally taking an excessive dose of metaraminol., A patient experiences an adverse reaction, such as bradycardia or an arrhythmia, after receiving the prescribed dose of an alpha-adrenoreceptor agonist during a surgical procedure., A patient with hypotension experiences inadequate symptom relief due to unintentional underdosing of metaraminol, requiring dosage adjustment and monitoring.

Documentation for T44.4 should clearly specify the agent involved (e.g., metaraminol or another alpha-adrenoreceptor agonist), the circumstances of the poisoning, adverse effect, or underdosing, the patient's presenting symptoms, and the treatment provided.If the incident was accidental, the documentation should reflect this. If it was intentional, this also needs to be documented.If the issue is an adverse reaction to a correctly administered dose, the reaction needs to be described in detail.

** For adverse effects, the nature of the adverse effect should be coded first. The drug giving rise to the adverse effect should be identified using codes from categories T36-T50 with fifth or sixth character 5. Use additional code(s) to specify manifestations of poisoning and underdosing.