This study aimed to determine the effect of health education on knowledge and attitude of high school students regarding substance abuse. A total of 159 respondents were included in the study. The lecture group (N=82) was taken from Diplahan National High School while the pamphlet group (N=77) was taken from Malangas National High School. Both are high schools in Zamboanga Sibugay Province. Post intervention assessments were done 1 week and 2 months after the intervention. In the pre-intervention, the lecture group (DNHS) had a mean score of 10.81. The pamphlet group (MNHS) had a mean score of 10.88. In post intervention 1, the lecture group (DNHS) and the pamphlet group (MNHS) had a mean score of 11.63 and 11.81 respectively. In post intervention 2, the lecture group (DNHS) and the pamphlet group (MNHS) had a mean score of 12.23 and 12.48 respectively. Analysis of means scores of the lecture group (DNHS) by Paired T-test showed that the increase from pre-intervention and post 1 was significant with a p-value of 0.000. The increase from post intervention 1 and post intervention 2 had a p-value of 0.000. Analysis of means scores of the pamphlet group (MNHS) by Paired T-test showed that the increase from pre-intervention and post 1 was significant with a p-value of 0.000. The increase from post intervention 1 and post intervention 2 had a p-value of 0.000. The results showed that the knowledge mean scores of both groups significantly increased, indicating that both lecture and pamphlet are effective in increasing the knowledge of the high school students on methamphetamine. However, when the knowledge scores of both groups were compared using individual T-test, there was no significant difference. In terms of attitude, both groups did not show improvement.

Keyword: health education substance abuse drug addiction diplahan