Understanding an overdose: intention, motivation, and risk.

BACKGROUND

Overdose is frequently categorized dichotomously: an inadvertent therapeutic or recreational misadventure versus a deliberate overdose for self-injurious or suicidal purposes. Categorizing overdoses based on this dichotomy of intention is fraught with methodological problems and may result in potentially inappropriate and/or divergent care pathways.

OVERDOSE-RELATED INTENT LIES ALONG A CONTINUUM: Suicidality can rapidly shift in magnitude and frequency at different points in time. A patient's overdose may reflect varying degrees of desire to die, ambivalence about living, disregard for risk, or pleasure-seeking. Careful assessment of overdose-related cognitions is warranted in all overdose patients.

THE CLINICAL INTERVIEW IS KEY TO UNDERSTANDING AN OVERDOSE

There is an irreducibly subjective character to an overdose such that a collaborative understanding of an overdose episode can only be discovered by spending time in dialogue with the patient. At the same time, the objective risk factors for and circumstances of the overdose need to be integrated with the subjective experience for a comprehensive prevention approach.

THERE CAN BE SEVERAL MOTIVATIONS UNDERLYING AN OVERDOSE

Some overdoses might be wholly inadvertent or simply impulsive. However, if there is some degree of intent present, then the patient who overdosed has attempted to communicate something by means of that overdose, and this message might include something other than the desire to die.

ATTENDING TO BOTH THE SUBJECTIVE AND OBJECTIVE PERSPECTIVES OF AN OVERDOSE CAN ASSIST IN IDENTIFYING MODIFIABLE RISK FACTORS

Overdose-related intent and motivation may be targeted with treatment plans to reduce elevated risk states. Some patient-specific overdose risk factors are modifiable, such as managing mental health and other psychosocial issues, reducing access to lethal means, and promoting safe prescribing and medication administration practices. Other risk factors are either unmodifiable (e.g., personal history of overdose) or involve public health systems.

CONCLUSIONS

Overdose-whether involving medications, illicit substances, hazardous chemicals, or otherwise-can be conceptualized as a single behavioral episode with variable intentionality, personal motivations, and risk factors. Clinical/medical toxicologists are uniquely positioned to contribute to personalized risk reduction post-overdose.