The author investigated situations and actions taken to solve the drug addiction problem in the highlands that happened in three phases. The first phase was before the government declared war on narcotic drugs in 1996. At this stage, methamphetamine was widespread within the network. The government did not set out clear policies on drug problems. Attempts to solve the problems by government officials were not carried out on a regular basis and community members did not trust them. The second phase was when the government was committed to overcoming drug problems (February to June 2003). State officials and local organizations seriously implemented the policies at the community level and villagers were more cooperative. The result was that the number of drug dealers and drug addicts was reduced significantly. The third phase was when the war on drugs was won (after December 3, 2003). Drug addiction was reduced dramatically. In some communities, there were neither drug dealers nor drug addicts, because drugs were not easily available and dealers were afraid of state power. Some drug kingpins fled their communities or suspended their trade for a short period. Within four months of the declared victory, it was known that drugs were available in the communities again.