Background: Human poisoning is not a common cause of death, but it secondarily leads to mortality by introducing injuries or cancers. The last update of human toxicological exposure in Thailand was published by Ramathibodi Poison Center (RPC) between 2001 and 2004. The authors want to update the toxicological exposure and focus on the differences between age groups to establish a prevention program for each group.

Objective: To explore toxicological exposure in humans, types of xenobiotics, clinical patterns, treatment and outcomes of intoxicated patients that were referred to the Siriraj Poison Control Center (SiPCC).

Materials and Methods: This is a retrospective study that included all cases that were referred to SiPCC from 2010 to 2012. Data were recorded into a paper-based form by pharmacists who were trained as the specialist in poison information, abstracted variables by two physicians, and validated data by three toxicologists. Data were analyzed by descriptive statistical method using SPSS version 18.0.

Results: The authors included 4,591 cases from 4,509 events. The incidences of human exposure were 1.89, 2.22, and 2.69 per 100,000 population in 2010, 2011, and 2012, respectively. The most common route of exposure was ingestion and a half of cases were suicidal gesture. The common agents that contributed to exposures were medications (35%), pesticides (29%), and household products (12.4%). The overall mortality ratio was 4.4 percent. Common xenobiotics that led to death were paraquat, carbamate, psychoactive medications, and acidic corrosive. The accidental ingestion occurred in all age-groups: children (4.9%), adult (5.6%) and elderly (15.4%).

Conclusion: The authors report significant aspects of patients with toxicological exposure in children, adults, and the elderly age groups and recommend a prevention program on mental health, pesticide handling (paraquat, carbamates), medication safety (psychoactive medications), and corrosives handling. Whereas, accidental ingestion from non-original containers occurred among all age groups, not only children as previous understood.

Keywords: Human intoxication, Age group, Clinical patterns, Mortality, Poisoning prevention