In this video Dr. McCauley uses The Periodic Table of Intoxicants and Addictions to explain the Dopamine Hypothesis and its potential for Cross-Addiction.
There are many drugs that release dopamine such as the usual drugs: Alcohol, Marijuana, Cocaine, and Nicotine. These form The Periodic Table of Intoxicants along with stimulants, entactogens (Ecstasy), entheogens (used to be called hallucinogens), dissociatives (PCP, Ketamine), sedative hypnotics (Valium, Xanax), hypnotics (GHB, Ambien), opioids (Morphine, Heroin, Methadone), inhalants and anabolic-androgenic steroids. They all have the ability to release dopamine in the pleasure area of the brain.
The Dopamine Hypothesis implies that if a person has a problem with one drug they are liable to develop a problem with any or all of the others. Not only chemicals release dopamine, but behavior can as well. Those who manipulate behaviors with things such as food, sex, and gambling, and codependency, can get the same surge of dopamine that they would from a drug. Cross-addiction occurs when a person tries to replace their chemical addiction with manipulating behaviors, and they end up having a very hard time staying sober from both.