Adverse effect of analeptics and opioid receptor antag, init

This code signifies an undesirable or harmful reaction experienced by a patient due to the therapeutic use of analeptics (stimulants) or opioid receptor antagonists. These adverse effects occur when the medication is administered correctly and as prescribed, but the patient still experiences an unintended negative outcome.

Use this code when a patient presents with symptoms or conditions directly attributable to an adverse effect from an analeptic or opioid receptor antagonist, and this is the first time the patient is being seen for this specific adverse reaction. Examples include hypertension or seizures from analeptics, or precipitated withdrawal symptoms from opioid antagonists, when the drug was given for its intended purpose.

• Always sequence this code first, followed by codes for the specific manifestation of the adverse effect.
• Ensure documentation clearly distinguishes between an adverse effect (correct drug, correct dose) and poisoning (overdose, wrong drug, or non-medicinal substance).
• Verify the encounter is indeed the "initial encounter" for this specific adverse effect. Subsequent encounters would use a different seventh character.