Marijuana, alcohol, and nicotine are all addictive substances that can lead to health plicationsincluding death ning task 2: True or False. 1. A gateway drug is a drug that STOPS a person from using harder drugs. 2. Teens who use gateways drugs are more likely to develop an addiction to harder drugs 3. Gateway drugs can lead to the use of other gateway drugs. 4. Gateway drugs lead young people from less-harmful drugs to more-harmful drugs 5. Example of gateway drugs are marijuana, alcohol and vape. help po ty