Write from facts rather than momentum
Pause long enough to remove accusations, assumptions, and details that belong to someone else. For a message about how to support someone quitting nicotine, use this factual base: use the person's own language for recovery, name the practical concern, and distinguish a lapse from what you do not know.
Offer a proportionate next step
Match the size of the request to the relationship and to what the recipient can reasonably decide now. Offer a specific sober or practical support option and encourage connection with qualified help. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Protect privacy on both sides
Do not shame, bargain, lend money without limits, or make your relationship the reward for recovery. For overdose, dangerous withdrawal, suicidal intent, violence, or immediate risk, contact emergency or crisis services now. Use the most private legitimate channel available and do not share the exchange to recruit support or pressure.