Abstract:
A report of survey on drug and substance abuse by NACADA revealed that 32.4% of people 
aged between 18-28 years have consumed alcohol or other type of drugs and substances. 
Majority of secondary school students are in the age bracket 14-22 years, the group that is most 
affected. Drug and substance abuse is partly responsible for the riots, strikes, destruction and 
burning of property in secondary schools. The prevalence rate of drug abuse in Kinango Sub County was 20.3%. The purpose of the study was to investigate predisposing factors that 
influence drug and substance abuse among secondary school students in Kinango Sub-County, 
Kwale County. The objectives of the study were; to establish the effect of parental influence on 
drug and substance abuse, to determine the influence of peer pressure on drug and substance 
abuse, to establish the influence of the media on drug and substance abuse and to determine the 
influence of age on drug and substance abuse among secondary school students. Erickson’s 
theory on social development and Bandura’s Social Learning Theory (SLT) helped in explaining 
the findings of the study. A survey research design was used to investigate the influence of the 
selected variables on drug and substance abuse among secondary school students. The study 
population comprised of all secondary school students, heads of guidance and counselling 
departments and deputy principals of secondary schools in Kinango sub-county totalling 4,964
people. 4 public secondary schools were selected through stratified random sampling to ensure 
gender balance. The sample size comprised of 4 deputy principals, 4 heads of guidance and 
counselling departments of the selected secondary schools and 384 students selected by random 
sampling. Data was collected through questionnaires for students and guidance and counselling 
teachers. An interview schedule was used to collect data from deputy principals. Validity of the 
instruments was ensured by using expert judgement of my supervisors. Reliability of the 
instruments was determined through a pilot study which was done to show the degree of 
consistence of the instruments, a Cronbach’s alpha of 0.817 was obtained. Raw data was edited 
to correct errors and omissions. Both descriptive and inferential statistics were used to make 
inferences and draw conclusions. This was done with help of SPSS version 23. The study 
established, from hypothesis one, that there was statistically significant influence of parental 
influence on drug and substance abuse among secondary school students in Kinango sub-County, 
p ˂ 0.05. Similarly, from hypothesis two, the study established that there was statistically 
significant influence of peer pressure on drug and substance abuse among secondary school 
students in Kinango sub-county, p ˂ 0.05. The study established, from hypothesis three, that 
there was no statistically significant influence of media on drug and substance abuse, p > 0. From 
hypothesis four, the study showed there was no statistically significant influence of age on drug 
and substance abuse in Kinango sub-county, p ˃ 0.05. Finally, the study found out that the age 
bracket 17-19 years had the highest number of students who have used drugs at least once. The 
researcher recommended that: parents should abstain from drugs because they are role models 
of their children; parents and teachers should guide students to avoid peers who abuse drugs; 
guidance and counselling should be strengthened in schools and all forms of drug advertising 
should be censored