Adverse effect of antiasthmatics, initial encounter

This code signifies an undesirable or harmful reaction experienced by a patient due to the therapeutic use of an antiasthmatic medication. These adverse effects are not due to an overdose or poisoning, but rather an expected or unexpected side effect when the drug is administered correctly. The "initial encounter" designation indicates that the patient is receiving active treatment for this specific adverse effect.

Apply this code when a patient presents with symptoms directly attributable to an antiasthmatic drug, such as tremors from a bronchodilator, or oral candidiasis from an inhaled corticosteroid, and it's their first time being treated for this particular adverse event. This code is appropriate for reactions that occur during routine medication use, not accidental or intentional misuse.

• Always sequence the manifestation code(s) of the adverse effect first, followed by this code.
• Ensure documentation clearly states the drug was administered correctly and the reaction is an adverse effect, not poisoning or underdosing.
• Verify the encounter is truly "initial" for this specific adverse effect; subsequent encounters would use a different 7th character.