Infection: Dying Days

Question: Are any of the people reading this novel cool with the use of drugs (like cannabis) and street slang (like n***a)? Because in order for my novel to have a sense of realism and originality, I might need to use these terms. Take note that I won't be frequently using them but I need to know just in case. Don't want to go offending anybody.

Thank you for your time and continue showing the support!