Dream about using cocaine is a metaphor for a need to change your ways and attitude. You need to offer more praise and encouragement toward others. Someone may be taking you to the cleaners. This is a signal for control over your emotions. Your privacy is being invaded.
Using cocaine dream expresses the beginning of something new things in your life. Perhaps you are not ready to move forward in a relationship or endeavor. You need to be leery of people who want to help you. Your dream is sometimes your desires for upward job mobility. Perhaps you need to incorporate aspects of your friend with your own self.
If you dreamt about using cocaine:
There is more to staying fit than eating right and exercising. You can benefit from paying closer attention to everything in your life: how clean is your car? Do you make your bed every morning? How long do you go without doing the laundry? These things affect how you perceive life, whether it is easy or hard, even going as far as whether you are optimistic or pessimistic. Use the force!