This reminds me of the age-old question about what came first - the chicken or the egg. Is there a way to find out whether addiction comes before depression or vice versa? All I know for sure is that they complement each other. They go hand in hand and if you happen to use, people might think you're depressed. On the other hand, if you really are depressed and everyone around you notices this, they can fairly assume you're prone to taking drugs (if you still haven't). It's a vicious cycle.