[header] How to talk to a friend about their risky behavior [title] Talk to your friend when you are both clear-minded. [step] The best time to speak with someone about their behavior is when you are both stress-free, in good moods and not under the influence of drugs or alcohol. Unfortunately, it may be difficult to find the time for a conversation when you are both at your absolute best. 
Still, you should try to initiate the conversation during a time when you think your friend will be more receptive. [substeps] For instance, avoid talking while you are out drinking with each other.